Curriculum Vitae
Name & Address
:
Dr. J. Gopalakrishnan, Ph.D.
FASc, FNA, FNASc, FWIF
Honorary Professor
INSA Senior Scientist
Solid State and Structural Chemistry Unit
Indian Institute of Science
Bangalore - 560 012, India
e-mail : gopal@sscu.iisc.ernet.in
phone : 91 - 80 - 2293 2537
fax
: 91 - 80 - 2360 1310
[Superannuated August 2006. Honorary Professor (IISc)
for five years. Ramanna Fellow (DST) for three years
(2007 – 2009)]
Date of birth
:
18 March 1944
Education
:
Master of Science in Chemistry (1964)
Madras University
Doctor of Philosophy (Ph.D.) in
Inorganic Chemistry (1968)
Indian Institute of Science
Bangalore, India.
Research interests
:
Solid state inorganic/materials chemistry: synthesis,
structure and properties of inorganic solids, mainly metal
oxides.
Positions held

Professor (February 1987 – July 2006)
Solid State and Structural Chemistry Unit
Indian Institute of Science
Bangalore

Dean, Science Faculty, IISc., Bangalore ( August 2005 – July 2006)

Professor (TATACHEM CHAIR) (2000-2003)
Solid State and Structural Chemistry Unit
Indian Institute of Science
Bangalore

Chairman (1984-87; 1989-1992)
Solid State and Structural Chemistry Unit
Indian Institute of Science
Bangalore
1

Associate Professor (1982-1987)
Solid State and Structural Chemistry Unit
Indian Institute of Science
Bangalore

Assistant Professor (1977-1982)
Solid State and Structural Chemistry Unit
Indian Institute of Science
Bangalore

Associate Lecturer and Lecturer (1969-1977)
Department of Chemistry
Indian Institute of Technology
Madras / Chennai
Professional experience
 Over 30 years of research experience in various aspects of solid state inorganic
chemistry.
 Authored or coauthored around 275 research papers in professional journals.
 Coauthored a book entitled NEW DIRECTIONS IN SOLID STATE
CHEMISTRY with Professor C. N. R. Rao, published by Cambridge University
Press (1986); revised and enlarged second edition (1997); translated into Chinese
and Russian languages.
 Supervised Ph. D. thesis work of 20 candidates (some of them jointly) at the
Indian Institute of Science, Bangalore and Indian Institute of Technology, Madras.
 Taught general chemistry and inorganic chemistry at the graduate (M.Sc.) and
undergraduate (B.Tech.) levels at the Indian Institute of Technology, Madras
(1969 – 1977).
 Taught solid state and materials chemistry to the Ph.D./research students at the
Indian Institute of Science, Bangalore (1978-present) and at University of
Maryland, U.S.A. (1999 – 2000).
 Chairman, Physical Chemistry PAC, Department of Science and Technology,
New Delhi (2005 – 2007).
Visits abroad
 Senior Fellow of the Alexander von Humboldt Foundation, Germany at the
Technical University, Berlin, Germany (1974-1975).
 Visitor for short periods (1-3 months) at the University of Oxford, U.K. (1981),
University of Caen, France (1985), University of Nantes, France (1994, 1997 and
1998).
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 Visiting Scientist at the Central Research & Development Department, E. I. Du
Pont de Nemours & Co., Wilmington DE, U.S.A. (1987-1989).
 Visiting Professor at the Superconductivity Research Center, Department of
Physics and Chemistry, University of Maryland, College Park, MD, U.S.A. (1994,
1999-2000).
 AvH Foundation supported visit to the Max Planck Institute for Solid State
Research, Stuttgart, Germany (September – December 2005).
Important invited lectures
 Soft Chemistry Conference, University of Nantes, France (1994).
 Department of Chemistry, Michigan State University, U.S.A. (1994).
 Texas Materials Institute, University of Texas at Austin, TX, U.S.A. (1994).

University of Maryland, College Park, U.S.A. (1999).
 NIST, Washington D.C. U.S.A. (2000).
 Du Pont C R & D, Wilmington DE, U.S.A. (2000).
 Invited lecture at the Materials for Energy Conference, Madrid, Spain (2002).
 A. V. Rama Rao Foundation Award Lecture at JNCASR, Bangalore (2003).
 ISCAS Gold Medal Award Lecture, IIT Delhi (2003).
 Invited lecture at NCL, Pune (2004).
 CRSI Silver Medal Award Lecture, IIT Kanpur (2004).
 Seminar at Max Planck Institute, Stuttgart, Germany (November 2005).
 Invited lecture at MTIC-XII Conference, IIT Madras (December 2007).
 Invited lecture at Delhi University (March 2008).
 Professor Sadhan Basu Memorial Lecture (2008) awarded by the Indian National
Science Academy, New Delhi.
Professional honours received
 Accomplishment Awards from Du Pont (1988, 1990).
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 Materials Research Society of India Prize for research in superconductivity
(1991).
 Federation of Indian Chamber of Commerce & Industry Award for contribution to
Chemical Sciences (1994).
 Choksi Award for Chemical Sciences, Indian Institute of Science, Bangalore
(2001).
 A. V. Rama Rao Foundation Prize for Chemistry, JNCASR, Bangalore (2003).
 Gold Medal for lifetime achievement in Solid State Chemistry by the Indian
Association of Solid State Chemists and Allied Scientists (2003).
 Silver Medal of the Chemical Research Society of India for outstanding
contribution to research in Chemistry (2004).
 Fellow of the Indian Academy of Sciences, Bangalore (1988).
 Fellow of the Indian National Science Academy, New Delhi (1994).
*
Fellow of the National Academy of Sciences, India, Allahabad (2001).
*
Fellow of the World Innovation Foundation (FWIF), U.K./U.S.A. (2002).
 Member, Asia-Pacific Academy of Materials (APAM), Russia (2003).
 Member, Editorial Advisory Board, Chemistry of Materials (ACS Journal)
(1996-2002).
*
Member, Board of Editors, Ionics-Internationl Journal of Ionics, Germany.
*
Member, Editorial Board, Journal of Chemical Sciences, Bangalore (2005-2008).
*
Member, Editorial Board, Indian J. Chem. (2005 - 2008).
*
Associate Editor, Materials Research Bulletin (U. S. A).
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A brief description of scientific achievements and interests of Professor
J. Gopalakrishnan
I started my research career in 1969 at the Department of Chemistry, Indian Institute
of Technology (IIT) Madras, where I worked in the catalysis group headed by the late
Professor M. V. C. Sastri. My responsibility was to investigate solid state chemistry
aspects, synthesis and structure of oxide materials employed in heterogeneous
catalysis research. The visit of Professor John B. Goodenough, then at MIT Lincoln
Laboratories, U. S. A. to IIT Madras in the early seventies, with whom I had extended
discussions after listening to his illuminating series of lectures on oxide materials, was
a significant event in my career. I became convinced about the challenging
opportunities that lie ahead for chemists in this field of chemistry, that later came to
be known as Materials Chemistry. My association and friendship with Professor
Goodenough continued throughout my career until today and he encouraged and
helped me on several occasions in my pursuit of a career in solid state/materials
chemistry of inorganic solids. Indeed, I regard and respect him as my professional
‘Guru’.
Nonmolecular inorganic solids, mainly transition metal oxides, has been the focus of
my research attention for over thirty years. Indeed my formal training in this area
started during 1974-75 when I was working with the late Professor Bertold Reuter,
at the Institute for Inorganic Chemistry, Technical University, Berlin, as a fellow of
the Alexander von Humboldt Foundation. A significant piece of work that I carried
out with Dr. Colsman and Prof. Reuter during this period is the investigation of
La2-xSrxNiO4 which resulted in a publication in the Journal of Solid State Chemistry
1977, 22, 145, where we have shown that hole doping in La2NiO4 is possible by
substitution of Sr for La. More importantly, the investigation suggested that the holes
doped are localized and ordered in the dz2 orbital of Ni (III) due to Jahn-Teller
distortion for x < 0.5 and the holes are delocalized and possibly ordered in dx2-y2 for x
> 0.5 compositions in the system La2-xSrxNiO4. These issues became great topics of
interest in oxide chemistry after the discovery of high temperature superconductivity
in 1986 in La2-xBaxCuO4 and similar cuprates. The results obtained by us 1974-75
stood the test of time and further vindicated by more recent investigations of the same
system by powerful structural tools (cf. for example, J. E. Millburn et al JSSC 1999,
145, 401). I would consider that our 1974-75 work on La2-xSrxNiO4 carried out at
Technical University, Berlin as one of my significant contributions and the training I
received under Professor Reuter at Berlin laid a firm foundation for the pursuit of a
career in inorganic solid state chemistry.
Today we know that nonmolecular inorganic solids, especially transition metal
oxides, (distinct from molecular inorganic compounds), constitute a major part of
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inorganic materials chemistry. Many of the technologically important materials of
current interest, such as LiCoO2 and LiFePO4 (electrodes for lithium battery), CrO2
and SrRuO3 (metallic ferromagnets), La1-xCaxMnO3 (charge ordering/colossal
magnetoresistance), La2-xSrxCuO4 (high Tc superconductivity), ZrW2O8 (negative
thermal expansion), KTiOPO4 and LiNbO3 (frequency doubling NLO material),
(VO)2P2O7 (industrial catalyst for oxidation of butane to maleic anhydride) and last
but not least, open framework materials exhibiting micro- and meso-porosity are all
extended nonmolecular inorganic solids. Working with Professor C. N. R. Rao at the
Solid State and Structural Chemistry Unit, IISc., Bangalore since December 1977, we
realized the importance of synthesis of nonmolecular inorganic solids. Recognizing
the limitations of conventional ‘heat-and-beat’ methods, we sought to develop
alternate synthetic strategies for the preparation of a wide variety of metal oxides. We
employed a variety of inorganic solids such as carbonates, oxalates, nitrates, oxide
hydrates and their solid solutions as ‘precursors’ and transformed them to the desired
products in appropriate chemical reactions such as dehydration, decomposition,
reduction/oxidation, atom insertion/extraction and so on. Details of these
investigations have been summarized in the following publications:
J. Gopalakrishnan, Proc. Indian Acad. Sci. (Chem. Sci.) 1984, 93, 421; C. N. R. Rao
and J. Gopalakrishnan, Acc. Chem. Res., 1987, 20, 228. Special mention must be
made of the synthesis of ReO3-like Mo1-xWxO3, anion-vacancy ordered perovskite
oxides such as La2Ni2O5 and La2Co2O5 (brownmillerite), tungsten bronzes and
intergrowth phases of layered perovskites, many of them for the first time. Powerful
electron microscopic techniques, besides conventional powder XRD and other
characterization methods, have enabled us to probe the crystal structures at the unit
cell level, revealing the inherent beauty and elegance of the architecture of inorganic
oxide materials. Some of these works are summarized in the following publications:
C. N. R. Rao, J. Gopalakrishnan, and K. Vidyasagar, Indian J. Chem., 1984, 23A,
265. V. Bhat and J. Gopalakrishnan, JCS, Chem. Commun., 1986, 1644. L.
Ganapathi, A. Ramanan, J. Gopalakrishnan and C. N. R. Rao, JCS Chem. Commun.,
1986, 62. and K. Vidayasagar, A. Reller, J. Gopalakrishnan and C. N. R. Rao, JCS,
Chem Commun., 1985, 7.
Another milestone in my research effort is the recognition of the role of
thermodynamics, metastability and the associated kinetic aspects, for the synthesis of
extended inorganic solids. Working with Professor A. W. Sleight and his group at
DuPont C R & D, U.S.A., on the synthesis of superconducting cuprates during 198789 has largely contributed to this understanding. This is particularly significant
because many of the extended inorganic solids of importance to materials chemistry
are all metastable materials. We developed a general, chemistry-based (chimie douce)
approach for the synthesis of a wide variety of metastable inorganic solids. The
strategy essentially involved prefabrication of thermodynamically stable phases by
6
high temperature synthesis and subsequent transformation of them into metastable
phases by an appropriate soft-chemical reaction such as ion-exchange, oxidationreduction, insertion-extraction, intercalation, acid leaching, metathesis, reactions in
molten salt and hydrothermal conditions. A distinction between topochemical and
nontopochemical reactions is often helpful in choosing the right chimie-douce
approach for the desired products. Typical examples of synthesis achieved by this
approach include: layered perovskite oxides of Ruddlesden-Popper type (K2La2Ti3O10,
H2La2Ti3O10), Dion-Jacobson type (CsLa2Ti2NbO10, HLa2Ti2NbO10), Aurivillius type
(Bi2La2Ti3O12), rutile-related oxides such as HMWO6 (M = Nb, Ta) and their
molybdenum analogs, V2(PO4)3 – a defect NASICON framework oxide, a variety of
KTiOPO4 derivatives showing NLO response, and last but not least, synthesis of the
metallic ferromagnet CrO2 at ambient pressure in a novel redox reaction between
CrO3 and NH4I. An interesting outcome of this research is the ‘slicing’ of threedimensional (3D) perovskite and rutile structures into two-dimensional (2D) analogs:
NaLaSrNb2CuO9 is a 3D perovskite, whereas CsLaSrNb2CuO9 is a 2D perovskite;
similarly LiNbMoO6 is a 3D rutile oxide, while HNbMoO6 is a 2D rutile oxide.
Collaboration with Professor M. Tournoux and Professor J. Rouxel, and their
group at IMN Nantes, France has helped to focus my research efforts in the area of
soft chemistry. My efforts on soft chemistry synthesis of oxide materials are described
in the review article: J. Gopalakrishnan, Chem. Mater.,1995, 7, 1265.
Our work on a large number of d0- metal oxides has led to the recognition of the
special role played by the second order Jahn-Teller (SOJT) effect in the formation,
structure and properties of d0 oxides in general. SOJT is concerned with structural
changes arising from nondegenerate ground state interacting with low-lying excited
states, as distinct from the first-order Jahn-Teller (FOJT) effect, which deals with
structural distortions arising from degenerate electronic ground states. Typically,
SOJT distortion becomes significant when the energy gap between the highest
occupied (HOMO) and the lowest unoccupied (LUMO) states is small, and there is a
symmetry driven distortion which mixes HOMO and LUMO states of appropriate
symmetry. This situation obtains in several d0 transition metal (M) oxides containing
MO6 octahedra. We explored the consequences of SOJT-driven d0 oxides at some
length and this has led, among others, to the synthesis of new inorganic oxides
exhibiting novel structures and materials properties: Examples include HLaTiO4 and
La2Ti2O, fresnoite type oxides (Ba1.5VOSi2O7) exhibiting NLO response and a series
of entropy-stabilized defective perovskite oxides, LiSr1.650.35B1.3B'1.7O9 (B = Ti, Zr ;
B' = Nb, Ta), exhibiting lithium ion conduction. These investigations are summarized
in the Feature Article: J. Mater. Chem. 1997, 7, 2297. Our recent research efforts in
the design and synthesis of metal oxides exhibiting a high mobility for lithium ions
are presented in the Feature Article: Lithium ion mobility in metal oxides, J. Mater.
Chem., 2003, 13, 433.
7
Present research effort in my group is directed towards rational design of extended
inorganic solids for specific/target materials properties. For this purpose, design of
not only the crystal structure but also of the electronic structure is important.
Properties that are currently in focus are: metallic/insulating ferromagnetism,
‘frustration’ and magnetism, redox insertion/extraction of light elements,
hydrogen/lithium coupled with ionic conduction, and pair-wise localization of
conduction electrons in special inorganic materials with the possibility of
superconductivity. We pursue a unit-by-unit assembly approach through appropriate
metathesis to build novel inorganic architectures where the foregoing properties could
be realized. An example of this approach to synthesis of new inorganic materials is
described in our publication: T. Sivakumar et al, 2D-3D transformation of layered
perovskites through metathesis: synthesis of new quadruple perovskites
A2La2CuTi3O12 (A = Sr, Ca), Inorg. Chem., 2004, 43, 1857. Recent efforts in this
direction have resulted in new ferromagnetic double perovskites (Pb2FeReO6,
Sr4M3ReO12 (M = Co, Fe), new hydrogen storage material (BaMnO3H3), and a novel
relaxor ferroelectric without lead (FeTiTaO6).
In a collaborative research carried out with the support of Professor Martin Jansen,
Max Planck Institute for Solid State Research, Stuttgart, Germany, I have explored
ruthenium(IV) pyrochlore oxides to reveal several novel electronic ground states: a
metallic and Pauli paramagnetic state for BiPbRu2O6.5, that turns into a
semiconducting ferromagnetic spin glass state for BiPbRuMnO6.5; a metallic state that
likely shows a charge density wave (CDW) instability for Bi 1.50Zn0.50Ru2O6.75, that is
suppressed by Mn substitution, and a metallic ferromagnetic spin glass state for the
pyrochlore Pb2Ru1.75Mn0.25O6.15. The results indeed affirm the richness of the
electronic properties of ruthenium-based metal oxides.
8
Research Publications of Prof. J. Gopalakrishnan
267.
S. Natarajan and J. Gopalakrishnan
Current Trends in Chemistry of Materials
Invited article for the Platinum Jubilee Special Publication of the Indian
Academy of Sciences, Bangalore (2009).
266.
R. J. Booth, R. Fillman, H. Whitaker, Abanti Nag, R. M. Tiwari, K. V.
Ramanujachary, J. Gopalakrishnan and S. E. Lofland
An Investigation of Structural, Magnetic and Dielectric Properties of R2NiMnO6
(R = rare earth, Y)
Mater. Res. Bull. 44, 1559 (2009).
265.
Preetam Singh, M. S. Hegde and J. Gopalakrishnan
Ce2/3Cr1/3O2+y: A New Oxygen Storage Material Based on the Fluorite Sttructure
Chem. Mater. 20, 7268-7273 (2008).
264.
J. Gopalakrishnan and Rohini Mani
Quest for new materials : Inorganic chemistry plays a crucial role
Invited lecture delivered at the Modern Trends in Inorganic Chemistry – XII
Conference held at Indian Institute of Technology, Madras, December 2007.
J Chem. Sci 121, 235-256 (2009).
263.
Abanti Nag, J. Manjanna, R. M. Tiwari and J. Gopalakrishnan
Sr4M3ReO12 (M = Co, Fe) : New ferromagnetic perovskite oxides
Chem. of Mater. 20, 4420 (2008).
262.
Rohini Mani, Michael Fischer, Joby E. Joy, J. Gopalakrishnan and Martin
Jansen
Ruthenium(IV) pyrochlore oxides: Realization of novel electronic properties
through substitution at A- and B-sites
Solid State Sciences 11, 189 (2009).
261.
Rohini Mani, P. Selvamani, Joby E. Joy, J Gopalakrishnan and T. K. Mandal
A study of Ba3MIIMIVWO9 (MII = Ca, Zn; MIV = Ti, Zr) perovskite oxides:
Competition between 3C and 6H structures
9
Inorg. Chem. 46, 6661 (2007).
260.
Tinku Baidya, M. S. Hegde and J. Gopalakrishnan
Oxygen-release/storage properties of Ce0.5M0.5O2 (M = Zr, Hf) oxides : Interplay
of crystal chemistry and electronic structure.
J. Phys. Chem. B 111, 5149 (2007).
259.
C. Azimonte, E. Granado, J. C. Cezar, J. Gopalakrishnan and K. Ramesha
Investigation of the local Fe magnetic moments at the grain boundaries of the
Ca2FeReO6 double perovskite
J. Appl. Phys. 101, 09H115 (2007).
258.
K. T. Jacob, V. S. Saji, J. Gopalakrishnan, and Y. Waseda
Thermodynamic evidence for phase transition in MoO2-δ.
J. Chem. Thermodynamics 39, 1539 (2007)
257.
R. Mani, S. N. Achary, K. R. Chakraborty, S. K. Deshpande, Joby E. Joy, A.
Nag, J. Gopalakrishnan, A. K. Tyagi
FeTiTaO6 : A lead-free relaxor ferroelectric based on the rutile structure.
Advanced Materials 20, 1348 (2008).
256.
C. Azimonte, J. C. Cezar, E. Granado, Q. Huang, J. W. Lynn, J. C. P. Campoy, J.
Gopalakrishnan and K. Ramesha
Incipient orbital order in half-metallic Ba2FeReO6.
Phys. Rev. Lett. 98, 017204 (2007).
255.
R. Mani, N. S. P. Bhuvanesh, K. V. Ramanujachary, W. Green, S. E. Lofland and
J. Gopalakrishnan
A novel one-pot metathesis route for the synthesis of double perovskites,
Ba3MM’2O9 ( M = Mg, Ni, Zn; M’ = Nb, Ta) with 1:2 ordering of M and M’
atoms.
J. Mater. Chem. 17, 1589 (2007).
254.
M. Tripathy, R. Mani and J. Gopalakrishnan
New substitutions and novel derivatives of the Aurivillius phases, Bi5TiNbWO15
and Bi4Ti3O12.
Mater. Res. Bull. 42, 950 (2007).
10
253.
K. P. Surendran, R. Mani, J. Gopalakrishnan, K. V. Ramanujachary, S. E.
Lofland and W. L. Green
R3Mn1.5CuV0.5O9 ( R = Y, Ho, Er, Tm, Yb and Lu) and Lu3Mn3-3xCu2xVxO9 :
New noncentrosymmetric oxides related to YMnO3.
Mater. Res. Bull. 42, 618 (2007).
252.
M. Tripathy, R. Mani and J. Gopalakrishnan
LixPb1-2xMxO (M = Al, Fe) : A new solid solution series related to yellow PbO
Mater. Res. Bull. 41, 2244 (2006).
251.
Z. S. Gonen, D. Paluchowski, P. Zavalij, B. W. Eichhorn and J. Gopalakrishnan
Reversible cation/anion extraction from K2La2Ti3O10 : Formation of new layered
titanates, KLa2Ti3O9.5 and La2Ti3O9.
Inorg. Chem. 45, 8736 (2006).
250.
T. K. Mandal and J. Gopalakrishnan
A new route to ordered double perovskites: Synthesis of rock salt oxides,
Li4MWO6, and their transformation to Sr2MWO6 (M = Mg, Mn, Fe, Ni) via
metathesis
Chem. Mater.17, 2310 (2005).
249.
T. K. Mandal, S. Augustine, J. Gopalakrishnan and Ph. Boullay
Bi4LnNb3O15 (Ln = La, Pr, Nd) and Bi4LaTa3O15: New intergrowth Aurivillius
related phases
Mater. Res. Bull. 40, 920 (2005).
248.
E. Granado, Q. Huang, J. W. Lynn, J. Gopalakrishnan and K. Ramesha
Crystal structures and magnetic order of (La,A)(Mn,Ru)O3 (A = Ca, Sr, Ba):
Possible orbital glass ferromagnetic state
Phys. Rev. B 70, 214416 (2004).
247.
T. K. Mandal, T. Sivakumar, S. Augustine and J. Gopalakrishnan
Heterovalent cation-substituted Aurivillius phases, Bi2SrNaNb2TaO12 and
Bi2Sr2Nb3-xMxO12 (M=Zr, Hf, Fe, Zn)
Materials Science and Engineering B, 121, 112 (2005).
246.
T. Sivakumar and J. Gopalakrishnan
11
Transformation of Dion-Jacobson phase to Aurivillius phase: Synthesis of
(PbBiO2)MNb2O7 (M = La, Bi)
Mater. Res. Bull. 40, 39 (2005).
245.
T. K. Mandal, L. Sebastian, J. Gopalakrishnan, L. Abrams and J. B.
Goodenough
Hydrogen uptake by barium manganite at atmospheric pressure
Mater. Res. Bull. 39, 2257 (2004).
244.
T. Sivakumar, K. Ramesha, S. E. Lofland, K. V. Ramanujachary, G. N. Subbanna
and J. Gopalakrishnan
2D-3D transformation of layered perovskites through metathesis: Synthesis of
new quadruple perovskites, A2La2CuTi3O12 (A = Sr, Ca)
Inorg. Chem. 43, 1857 (2004).
243.
Ramesh Sharma, T. K. Mandal, K. Ramesha and J. Gopalakrishnan
Synthesis and characterization of AgBiO3 with the cubic KSbO3 structure
Indian J. Chem. 43A, 11 (2004).
242.
Z. Serpil Gönen, T. K. Mandal, J. Gopalakrishnan, B. W. Eichhorn and R. L.
Greene
Novel ABO3 oxides related to perovskite and YAlO3 structure types in the La-BV-O (B = Ni, Cu) systems
Indian J. Chem. 42A, 2228 (2003).
241.
Litty Sebastian and J. Gopalakrishnan
Lithium ion mobility in metal oxides: a materials chemistry perspective
J. Mater. Chem. 13, 433 (2003).
240.
Litty Sebastian, R. S. Jayashree and J. Gopalakrishnan
Probing the mobility of lithium in LISICON: Li+/H+ exchange studies in
Li2ZnGeO4 and Li2+2xZn1-xGeO4
J. Mater. Chem. 13, 1400 (2003).
239.
Litty Sebastian, Y. Piffard, A. K. Shukla, F. Taulelle and J. Gopalakrishnan
12
Synthesis, structure and lithium-ion conductivity of Li2-2xMg2+x(MoO4)3 and
Li3M(MoO4)3 (MIII = Cr, Fe)
J. Mater. Chem. 13, 1797 (2003).
238.
Litty Sebastian and J. Gopalakrishnan
Li2MTiO4 (M = Mn, Fe, Co, Ni): New cation-disordered rocksalt oxides
exhibiting oxidative deintercalation of lithium: Synthesis of an ordered Li2NiTiO4
J. Solid State Chem. 172, 171 (2003).
237.
T. Sivakumar and J. Gopalakrishnan
Reaction of La2CuO4 with binary metal oxides in the solid state: metathesis,
addition and redox metathesis pathways
Chem. Mater. 14, 3984 (2002).
236.
K. Ramesha, L. Sebastian, B. Eichhorn and J. Gopalakrishnan
Perovskite and pyrochlore modifications of Pb2MnReO6: synthesis, structure and
electronic properties
Chem. Mater. 15, 668 (2003).
235.
Litty Sebastian, S. Sumithra, J. Manjanna, A. M. Umarji and J. Gopalakrishnan
Anomalous thermal expansion behaviour of Ln2Mo4O15 (Ln = Y, Dy, Ho, Tm)
Mater. Sci. & Engg. B 103, 289 (2003).
234.
G. Stoltz, K. Ramesha, S. A. Sirchio, Z. S. Gönen, B. W. Eichhorn, L.
Salamanca-Riba and J. Gopalakrishnan
Topochemical anion metathesis routes to the Zr2N2S phases and the Na2S and
ACl derivatives (A = Na, K, Rb)
J. Am. Chem. Soc. 125, 4285 (2003).
233.
M. Panda, R. Seshadri and J. Gopalakrishnan
Preparation of PbZrO3/ASO4 composites (A = Ca, Sr, Ba) and PbZrO3 by
metathetic reactions in the solid state
Chem. Mater. 15, 1554 (2003).
232.
K. Ramesha, L. Sebastian, B. Eichhorn and J. Gopalakrishnan
Pb2FeReO6: new defect pyrochlore oxide with a geometrically frustrated Fe/Re
13
sublattice
J. Mater. Chem. 13, 2011 (2003).
231.
Y. G. Zhao, W. Cai, J. Zhao, X. P. Zhang, R. Fan, B. S. Cao, M. H. Zhu, T. Wu,
S. B. Ogale, S. R. Shinde, T. Venkatesan, Q. Y. Tu, T. K. Mandal and
J. Gopalakrishnan
Insulator-metal transition and magnetoresistance of La0.5Ca0.5MnOy induced by
tuning the oxygen content
J. Appl. Phys. 92, 5391 (2002).
230.
Y. G. Zhao, W. Cai, J. Zhao, X. P. Zhang, B. S. Cao, M. H. Zhu, L. W. Zhang, S.
B. Ogale, T. Wu, T. Venkatesan, L. Lu, T. K. Mandal and J. Gopalakrishnan
Electrical transport and magnetic properties of La0.5Ca0.5MnO3-y with varying
oxygen content
Phys. Rev. B 65, 144406 (2002).
229.
T. Sivakumar, S. E. Lofland, K. V. Ramanujachary, K. Ramesha, G. N. Subbanna
and J. Gopalakrishnan
Transforming n = 1 members of the Ruddlesden-Popper phases to a n = 3
member through metathesis: Synthesis of a new layered perovskite,
Ca2La2CuTi2O10
J. Solid State Chem. 177, 2635 (2004).
228.
T. K. Mandal and J. Gopalakrishnan
From rocksalt to perovskite: a metathesis route for the synthesis of perovskite
oxides of current interest
J. Mater. Chem. 14, 1273 (2004).
227.
T. Sivakumar, R. Seshadri and J. Gopalakrishnan
Bridging the Ruddlesden-Popper and the Aurivillius phases: Synthesis and
structure of a novel series of layered perovskite oxides, (BiO)LnTiO4 (Ln = La,
Nd, Sm)
J. Amer. Chem. Soc. 123, 11496 (2001).
226.
Z. Serpil Gönen, J. Gopalakrishnan, B. W. Eichhorn and R. L. Greene
Structurally modulated magnetic properties in the A3MnRu2O9 phases (A = Ba,
Ca): The role of metal-metal bonding in perovskite related oxides
14
Inorg. Chem. 40, 4996 (2001).
225.
Litty Sebastian, A. K. Shukla and J. Gopalakrishnan
New lithium-ion conducting perovskite oxides related to (Li,La)TiO4
Proc. Indian Acad. Sci. (Chem. Sci.) 113, 427 (2001).
224.
K. Ramesha, J. Gopalakrishnan, V. Smolyaninova and R. L. Greene
ALaFeVO6 (A = Ca, Sr): New double perovskite oxides
J. Solid State Chem. 162, 250 (2001).
223.
Z. Serpil Gönen, J. Gopalakrishnan, S. A. Sirchio, B. W. Eichhorn, V.
Smolyaninova and R. L. Greene
Lithium substitution in LaMnO3: Synthesis, structure and properties of
LaMn1-xLixO3 perovskites
J. Solid State Chem. 159, 68 (2001).
222.
J. Gopalakrishnan, Z. Serpil Gönen, K. S. Chang, I. Takeuchi, T. K. Mandal, B.
W. Eichhorn, J. C. Fettinger andd R. L. Greene
Synthesis and structure of La14V6CuO36.5: A transparent Cu(I) vanadate
containing rare [OCuO]3- sticks
J. Mater. Chem. 12, 3839 (2002).
221.
Litty Sebastian, J. Gopalakrishnan and Y. Piffard
Synthesis, crystal structure and lithium-ion conductivity of LiMgFSO4
J. Mater. Chem. 12, 374 (2002).
220.
T. K. Mandal, N. Y. Vasanthacharya and J. Gopalakrishnan
A novel metathesis route for the synthesis of La2CuO4 and its superconducting
analogues: Synthesis of a new lithium-substituted derivative of La2CuO4
J. Mater. Chem. 12, 635 (2002).
219.
E. Granado, Q. Huang, J. W. Lynn, J. Gopalakrishnan, R. L. Greene and K.
Ramesha
Spin orbital ordering and mesoscopic phase separation in the double perovskite
Ca2FeReO6
Phys. Rev. B 66, 64409 (2002).
15
218.
J. Gopalakrishnan, T. Sivakumar, K. Ramesha, V. Thangadurai and G. N.
Subbanna
Transformations of Ruddlesden-Popper oxides to new layered perovskite oxides
by metathesis reactions
J. Amer. Chem. Soc. 122, 6237 (2000).
217.
J. Gopalakrishnan, A. Chattopadhyay, S. B. Ogale, T. Venkatesan, R. L.
Greene, A. J. Millis, K. Ramesha, B. Hannoyer and G. Marest
Metallic and nonmetallic double perovskites: A case study of A2FeReO6 (A = Ca,
Sr, Ba)
Phys. Rev. B 62, 9538 (2000).
216.
K. Ramesha and J. Gopalakrishnan
Chimie douce synthesis of a new nonlinear optical material: Ba1.5VOSi2O7
Solid State Sciences 3, 113 (2001).
215.
S. Kale, S. E. Lofland, S. M. Bhagat, Litty Sebastian, K. Ramesha, J.
Gopalakrishnan, S. B. Ogale, Y. H. Li and J. Garrison
Giant magnetoimpedance near a metal-insulator transition - a study of Fe in V2O3
matrix
Appl. Phys. Lett. 77, 2725 (2000).
214.
A. Arulraj, K. Ramesha, J. Gopalakrishnan and C. N. R. Rao
Magnetoresistance in the double perovskite Sr2CrMoO6
J. Solid State Chem. 155, 233 (2000).
213.
V. Thangadurai, A. K. Shukla and J. Gopalakrishnan
LiSr1.650.35B1.3B1.7O9 (B = Ti, Zr; B= Nb, Ta): New lithium ion conductors
based on the perovskite structure
Chem. Mater. 11, 835 (1999).
212.
V. Thangadurai, A. K. Shukla and J. Gopalakrishnan
New lithium-ion conductors based on the NASICON structure
J. Mater. Chem. 9, 739 (1999).
16
211.
V. Thangadurai, A. K. Shukla and J. Gopalakrishnan
La0.9Sr0.1Ga0.8Mn0.2O2.85: a new oxide-ion conductor
J. C. S. Chem. Commun. 2647 (1998).
210.
V. Thangadurai, G. N. Subbanna, and J. Gopalakrishnan
Ln2Ti2O7 (Ln = La, Nd, Sm, Gd): a novel series of defective Ruddlesden–
Popper phases formed by topotactic dehydration of HLnTiO4
J. C. S. Chem. Commun. 1299 (1998).
209.
K. Ramesha and J. Gopalakrishnan
A new method for the synthesis of chromium (IV) oxide at ambient pressure
Chem. Commun. 1173 (1999).
208.
V. Thangadurai, A. K. Shukla and J. Gopalakrishnan, O. Joubert, L. Brohan and
M. Tournoux
X-ray powder diffraction study of LiLnTiO4 (Ln = La, Nd): a new lithium-ion
conductor
Materials Science Forum, Trans-Tech, Switzerland (1999).
207.
K. Ramesha, V. N. Smolyaninova, J. Gopalakrishnan and R. L. Greene
ALaMn2O6-y (A = K, Rb): Novel ferromagnetic manganites exhibiting negative
giant magnetoresistance
Chem. Mater. 10, 1436 (1998).
206.
J. B. Goodenough, J. Gopalakrishnan and K. Ramesha
Dense hydrogen and disproportionation
J. Solid State Chem. 138, 369 (1998).
205.
J. Gopalakrishnan, K. Ramesha, K. K. Rangan and S. Pandey
In search of inorganic nonlinear optical materials for second harmonic generation
J. Solid State Chem. 148, 75 (1999).
204.
J. Gopalakrishnan, T. Sivakumar, V. Thangadurai and G. N. Subbanna
A[Bi3Ti4O13] and A[Bi3PbTi5O16] (A = K, Cs) : new n = 4 and n = 5
members of the layered perovskite series, A[A1n-1BnO3n+1] and their hydrates
17
Inorg. Chem. 38, 2802 (1999).
203.
J. Gopalakrishnan, A. K. Shukla and V. Thangadurai
Rational design of solid materials: a case study of lithium-ion conductors
Current Science (India) 76, 1473 (1999).
202.
K. Ramesha, V. Thangadurai, D. Sutar, S. V. Subramanyam, G. N. Subbanna and
J. Gopalakrishnan
ALaMnBO6 (A = Ca, Sr, Ba; B = Fe, Ru) double perovskites
Mater. Res. Bull. 35, 559 (1999).
201.
W. Prellier, V. Smolyaninova, A. Biswas, C. Galley, R. L. Greene, K. Ramesha
and J. Gopalakrishnan
Properties of the ferrimagnetic double-perovskites, A2FeReO6 (A = Ba and Ca)
J. Phys. C. 12, 965 (1999).
200.
J. Gopalakrishnan, Sonal Pandey and K. Kasthuri Rangan
A convenient route for the synthesis of transition metal pnictides by direct
reduction of phosphate, arsenate and antimonate precursors
Chem. Mater. 9, 2113 (1997).
199.
N. S. P. Bhuvanesh and J. Gopalakrishnan
Solid state chemistry of early transition metal oxides containing d0 and d1 cations
– A Feature Article.
J. Mater. Chem. 7, 2297 (1997).
198.
K. Kasthuri Rangan, O. Joubert, A. Verbaere, M. Tournoux and J.
Gopalakrishnan
Mo3O5(OH)2(AsO4)2 : A new solid with a structure related to beta-VOPO4
European J. Solid State Inorg. Chem. 34, 511 (1997).
197.
K. Kasthuri Rangan, A. Verbaere and J. Gopalakrishnan
Structure of KNb0.5V0.5OPO4, a KTiOPO4-analog
Mater. Res. Bull. 33, 395 (1998).
196.
V. Thangadurai, A. K. Shukla and J. Gopalakrishnan
18
Oxide-ion conduction in anion-deficient double perovskites, Ba2BBO5.5 (B = Li,
Na; B = Mo, W, Te)
Solid State Ionics 104, 277 (1997).
195.
J. Gopalakrishnan, N. S. P. Bhuvanesh and K. Kasthuri Rangan
Towards rational synthesis of inorganic solids
Current Opinion in Solid State and Materials Science 1, 285 (1996).
194.
K. Kasthuri Rangan and J. Gopalakrishnan
Synthesis of layered MoOPO4.2H2O and investigation of its intercalation
chemistry
Inorg. Chem. 35, 6080 (1996).
193.
V. Thangadurai, G. N. Subbanna, A. K. Shukla and J. Gopalakrishnan
AM1-xAlxO3-x (A = K or Na; M = Nb or Ta): New anion-deficient perovskite
oxides exhibiting oxide ion conduction.
Chem. Mater. 8, 1302 (1996).
192.
P. Vishnu Kamath, G. H. A. Theresa and J. Gopalakrishnan
On the existence of hydrotalcite-like phases in the absence of trivalent cations
J. Solid State Chem. 128, 38 (1997).
191.
N. S. P. Bhuvanesh, B. R. Prasad, C. K. Subramanian and J. Gopalakrishnan
Nonlinear optical response of rutile-related oxides, LiMVMVIO6, and their
derivatives obtained by ion-exchange and intercalation
Chem. Commun. 289 (1996).
190.
S. Uma and J. Gopalakrishnan
Polymerization of aniline in layered perovskites
Mater. Sci. & Engg. B 34, 175 (1995).
189.
N. S. P. Bhuvanesh and J. Gopalakrishnan
Synthesis of rutile-related oxides, LiMMoO6 (M = Nb, Ta) and their proton
derivatives. Intercalation chemistry of novel Bronsted acids, HMMoO6.H2O
19
Inorg. Chem. 34, 3760 (1995).
188.
K. Ramesha, S. Uma, N. Y. Vasanthacharya and J. Gopalakrishnan
New La2CuO4 derivatives, La2-2xSr2xCu1-xMxO4 (M = Ti, Mn, Fe or Ru): A study
of linear Cu-O-M electronic interaction in two-dimension
J. Solid State Chem. 128, 169 (1997).
187.
M. Dixit, P. V. Kamath and J. Gopalakrishnan
Zinc-substituted alpha-nickel hydroxide as an electrode material for alkaline
secondary cells
J. Electrochem. Soc. 146, 79 (1999).
186.
N. S. P. Bhuvanesh and J. Gopalakrishnan
Polymerization of aniline in layered HMMoO6. H2O (M = Nb, Ta)
Mater. Sci. & Engg. B 53, 267 (1998).
185.
Z. Serpil Gönen, J. Gopalakrishnan and B. W. Eichhorn
Ferrimagnetism and metal-insulator transition in the LaMn1-xRuxO3 perovskites
Solid State Sciences 4, 773 (2002).
184.
S. E. Lofland, T. Scabarozi, S. Kale, S. M. Bhagat, S. B. Ogale, T. Venkatesan,
R. L. Greene, J. Gopalakrishnan and K. Ramesha
Ferromagnetic resonance and magnetization studies on ferrimagnetic double
perovskites A2FeReO6 (A = Ca, Sr, Ba)
IEEE Transactions on Magnetics 37, 2153 (2001).
183.
J. Gopalakrishnan, S. Uma, N. Y. Vasanthacharya and G. N. Subbanna
Slicing the perovskite structure into layers: Synthesis of novel three-dimensional
and layered perovskite oxides, ALaSrNb2MIIO9 (A = Na, Cs)
J. Amer. Chem. Soc. (Communication) 117, 2353 (1995).
182.
J. Gopalakrishnan
Chimie douce approaches to
Review
the synthesis of metastable oxide materials - A
Chem. Mater. 7, 1265 (1995).
20
181.
K. Kasthuri Rangan and J. Gopalakrishnan
AMVMIII(PO4)3:
structures
New mixed metal phosphates having NASICON and related
Inorg. Chem. 34, 1969 (1995).
180.
N. S. P. Bhuvanesh, S. Uma, G. N. Subbanna and J. Gopalakrishnan
Acid-leaching of LiMW2O8 (M = Al, Fe) in Aqueous HNO3 : Formation of
WO3.H2O and WO3.1/3H2O.
J. Mater. Chem. 5, 927 (1995).
179.
J. Ismail, M. F. Ahmed, P. Kamath, G. N. Subbanna, S.
J. Gopalakrishnan
Uma and
Organic additive mediated synthesis of novel cobalt (II) hydroxides
J. Solid State Chem. 114, 550 (1995).
178.
V. Thangadurai, A. K. Shukla and J. Gopalakrishnan
Proton conduction in layered perovskite oxides
177.
Solid State Ionics 73, 9 (1994).
V. Sharma, A. K. Shukla and J. Gopalakrishnan
Bi2W 1-xCuxO6-2x (0.7  x  0.8) : A new oxide ion conductor
J. Mater. Chem. 4, 703 (1994).
176.
A. K. Shukla and J. Gopalakrishnan
Solid oxide-ion electrolytes - a review
Bull. Electrochem. (India) 11, 109 (1995).
175.
S. Uma and J. Gopalakrishnan
Synthesis of anion-deficient layered perovskites, ACa2Nb3-xMxO10-x (A = Rb,
Cs; M = Al, Fe), exhibiting ion- exchange and intercalation
Chem. Mater. 6, 907 (1994).
174.
V. Manivannan, C. Shivakumara and J. Gopalakrishnan
Evidence for two distinct mechanisms for holes in single-thallium layer
cuprate superconductors
21
Modern Phys. Lett. 138, 339 (1994).
173.
J. Gopalakrishnan, C. Shivakumara and V. Manivannan
Superconducting thallium cuprates obtained by substitution of copper for
thallium in the double-thallium layer cuprates (Tl 2212)
Mater. Res. Bull. 29, 369 (1994).
172.
P. S.Herle, M. S. Hegde, N. Y. Vasanthacharya, J. Gopalakrishnan and G. N.
Subbanna
Synthesis, structure and properties of LiWN2
J.Solid State Chem. 112, 20, (1994).
171.
P. S. Herle, N. Y. Vasanthacharya, M. S. Hegde and J. Gopalakrishnan
Synthesis of new transition metal nitrides, MWN2 (M = Mn, Co, Ni)
J. Alloys and Compounds 217, 22 (1995).
170.
J. Gopalakrishnan
New approaches to the synthesis of oxide materials
In Perspectives in Solid State Chemistry (Ed. K. J. Rao), Narosa Publishing
House, New Delhi (1995); pp 79-96.
169.
H. L. Ju, J. Gopalakrishnan, J. L. Peng, Qi. Li, G. C. Xiong, T. Venkatesan
and R. L. Greene
Dependence of giant magnetoresistance on oxygen
magnetization in polycrystalline La0.67Ba0.33MnOz
stoichiometry
and
Phys. Rev. B. 51, 6143 (1995).
168.
K. Kasthuri Rangan,
Gopalakrishnan
B. R.
Prasad,
C. K.
Subramanian
and
J.
Coupled substitution of niobium and silicon in KTiOPO4and KTiOAsO4.
Synthesis and nonlinear optical properties of KTi1--x NbxOX1--xSixO4 (X = P, As)
Inorg. Chem. 32, 4291 (1993).
167.
K. Kasthuri Rangan and J. Gopalakrishnan
New titanium-vanadium phosphates of NASICON and
langbeinite
structures, and difference between the two structures towards deintercalation
of alkali metal.
22
J. Solid State Chem. 109, 116 (1994).
166.
J. Gopalakrishnan, K. Kasthuri Rangan, B. R. Prasad
Subramanian
and
C. K.
New transition metal phosphates related to KTiOPO4.
J. Solid State Chem. 111, 41 (1994).
165.
J. Gopalakrishnan, N. S. P. Bhuvanesh and A. R. Raju
Soft-Chemical synthesis of new layered and three dimensional oxide hydrates,
HxVxW1-xO3. yH2O related to WO3. 2H2O and WO3. 1/3 H2O.
Chemistry of Materials 6, 373 (1994).
164.
J. Gopalakrishnan, S. Uma, K. Kasthuri Rangan and N. S. P. Bhuvanesh
Synthesis of novel metal oxides by soft-chemistry routes
In Soft Chemistry Routes to New Materials - Chimie Douce (Eds. J. Rouxel et
al.),Trans-Tech Switzerland (1994); p. 175.
163.
V. Manivannan, N. Rangavittal, J. Gopalakrishnan and C. N. R. Rao
Structure and superconducting properties of a new family of thallium cuprates
Physica C. 208, 253 (1993).
162.
V. Manivannan, J. Gopalakrishnan and C. N. R. Rao
Synthesis of perovskite phases in the Ba-Pb-Cu-O, Ba-Bi-Cu-O and Ba-Pb-TlCu-O systems. Possibility of superconductivity up to 72K in a perovskite-like
phase in the Ba-Pb-Tl-Cu-O system
J. Solid State Chem. 109, 205 (1994).
161.
P. Vishnu Kamath, J. Ismail, M. F. Ahmed, G. N. Subbanna and
J. Gopalakrishnan
Stabilization of nickel hydroxide in the presence of organic additives : A
chemical route to bulk synthesis
J. Mater. Chem. 3, 1285 (1993).
160.
J. Gopalakrishnan, S. Uma, K. Kasthuri Rangan and N. S. P. Bhuvanesh
Soft-Chemical routes to synthesis of solid oxide materials
Proc. Indian Acad. Sci. (Chemical Sciences) 106, 609 (1994).
23
159.
K. Kasthuri Rangan, B. R. Prasad, C. K. Subramanian and J. Gopalakrishnan
Soft chemical synthesis of new nonlinear optical materials, K0.5M0.5Ti0.5OPO4
(M = Nb, Ta), related to KTiOPO4
J. Chem. Soc. Chem. Commun. 141 (1994).
158.
S. Uma and J. Gopalakrishnan
Synthesis of novel oxide pyrochlores, A2BB'O7 (A = La, Nd; BB' = Pb, Sn, Bi)
by alkali melt route
J. Solid State Chem. 105, 595 (1993)
157.
J. Gopalakrishnan, S. Uma and V. Bhat
Synthesis of layered perovskite oxides, ACa2-xLaxNb3-xTixO10 (A = K, Rb, Cs),
and characterization of new solid acids, HCa2-xLaxNb3-xTixO10 (0  x  2.0)
exhibiting variable Bronsted acidity
Chemistry of Materials 5, 132 (1993).
156.
S. Uma and J. Gopalakrishnan
Bridging the Ruddlesden - Popper series and the Dion-Jacobson series of layered
perovskites: Synthesis of layered oxides, A2-xLa2Ti3-xNbxO10 (A = K, Rb, H)
exhibiting ion-exchange and intercalation
J. Mater. Chem. 3, 709 (1993).
155.
S. Uma and J. Gopalakrishnan
K1-xLaxCa2-xNb3O10, a layered perovskite series with variable interlayer cation
density, and LaCaNb3O10, a novel layered perovskite with no interlayer cations
J. Solid State Chem. 102, 332 (1993).
154.
G. Mangamma, V. Bhat, J. Gopalakrishnan and S. V. Bhat
NMR study of fast protonic conduction in layered HLa2NbTi2O10 1.5 H2O
Solid State Ionics 58, 1 303 (1992).
153.
V. Sharma, A. K. Shukla and J. Gopalakrishnan
Effect of aliovalent cation substitution on the oxide ion conductivity of Bi4V2O11
Solid State Ionics 58, 359 (1992).
24
152.
J. Gopalakrishnan
Doping charge carriers in High Tc cuprates
In Superconductivity (New Insights and Current Trends in High Tc
Superconductors) (Eds. S. Gregoli, B. Raveau and C.N.R. Rao)
Commission of European Communities (1992); pp 16-17.
151.
J. Gopalakrishnan
Solid State Chemistry of Thallium Oxides
In Thallium-Based High Temperature Superconductors (Eds. A. M. Hermann
and J. V. Yakhmi), Marcel Dekker, New York (1994).
150.
M.S. Hegde, K. M. Sathyalakshmi, S. Ramesh, N. Y. Vasanthacharya and
J. Gopalakrishnan
New defect-perovskite oxides related to the Yttrium-Barium-Copper oxide
superconductor
Mater. Res. Bull. 27, 1099 (1992).
149.
V. Sharma, J. Gopalakrishnan and A. K. Shukla
Effect of aliovalent cation substitution on the oxygen ion conductivity of
Bi4V2O11
In Solid State Ionics : Materials and Applications, pp. 427-431 (Eds. B.V.R.
Chowdari et al), World Scientific (1992).
148.
J. Gopalakrishnan and K. Kasthuri Rangan
V2(PO4)3 : A novel NASICON- type vanadium phosphate synthesized by
oxidative deintercalation of sodium from Na3V2(PO4)3
Chemistry of Materials 4, 745 (1992).
147.
J. Gopalakrishnan, R. Vijayaraghavan, R. Nagarajan and C. Shivakumara
In defense of the bromine method for the determination of hole concentration in
superconducting thallium cuprates
J. Solid State Chem. 96, 468 (1992).
146.
J. Gopalakrishnan, R. Vijayaraghavan, R. Nagarajan and C. Shivakumara
Determination
superconductors
of
hole
concentration
25
in
thallium
cuprate
J. Solid State Chem. 93, 272 (1991).
145.
R. Vijayaraghavan, J. Gopalakrishnan and C. N. R. Rao
Structure and superconducting properties of the Tl1-xCaBa2Cu2O7 and
Tl1-yY1-xCaxBa2Cu2O7– series
J. Mater. Chem. 2, 327 (1992).
144.
J. Gopalakrishnan
Chemistry of superconducting bismuth, thallium and lead cuprates
In High-Temperature Superconductors (ed. C.N.R. Rao), World Scientific,
Singapore (1992).
143.
J. Gopalakrishnan
Synthesis of oxide materials
In Chemistry of Advanced Materials (ed. C.N.R. Rao), IUPAC - Blackwell
Scientific Publications, Oxford (1992).
142.
V. Manivannan, N. Y. Vasanthacharya and J. Gopalakrishnan
(Bi,Pb)2 (Sr,Ln)2CuO6 (Ln = La, Pr, Nd) New superconducting cuprates related
to Bi2Sr2CuO6+y
Mater. Res. Bull. 26, 349 (1991).
141.
J. Gopalakrishnan, V. Manivannan, G. N. Subbanna and C. N. R.Rao
Superconductivity in modulation-free BiPbSr2Ln
earth)
1-xCaxCu2O8
(Ln = Y or rare
European J. Solid State Inorg. Chem. 28, 1091 (1991).
140.
A. K. Shukla, A. M. Kannan, M. S. Hegde and J. Gopalakrishnan
Effect of counter cations on the electrocatalytic activity of oxide
pyrochlores towards oxygen
reduction and evolution reactions in alkaline
medium : An electrochemical and spectroscopic study.
J. Power Sources 35, 163 (1991).
139.
R. Nagarajan, N. Y. Vasanthacharya, J. Gopalakrishnan and C. N. R. Rao
Superconductivity in Ba (Pb, Bi, Sb)O3, Ba(Pb, Bi, Te)O3 and (Ba, La) (Pb, Bi,
Tl)O3– systems
26
Solid State Commun. 77, 373 (1991).
138.
V. Manivannan, J. Gopalakrishnan and C. N. R. Rao
Modulation-free bismuth-lead cuprate superconductors: BiPbSr1+xLa1--xCuO6 and
BiPbSr2Y1-xCaxCu2O8
Phys. Rev. B 43, 8686 (1991).
137.
S. Uma and J. Gopalakrishnan
A2MoTiO7-x (A = rare earth or Y) : a new series of oxide pyrochlores prepared
by topochemical reduction of A2MoTiO8 scheelites
J. Alloys and Compounds 184, 343 (1992).
136.
C. N. R. Rao, J. Gopalakrishnan, A. K. Santra and V. Manivannan
Relation between Tc and hole concentration in superconducting cuprates
Physica C 174, 11 (1991).
135.
Ram Seshadri, V. Manivannan, K. P. Rajeev, J. Gopalakrishnan and C. N. R.
Rao
Superconductivity in Ba1-ySryPb1-xBixO3
J. Solid State Chem. 89, 389 (1990).
134.
G. M. Luke et al. (J. Gopalakrishnan is an author)
Magnetic order and electronic phase diagrams of electron-doped copper oxide
materials
Phys. Rev. B 42, 7981 (1990).
133.
M. A. Subramanian, J. Gopalakrishnan, C. C. Torardi, P. L. Gai and A. W.
Sleight
High Tc– superconductors: Structures, defects, nonstoichiometry and Tc–
correlations
International Conference on Superconductivity, Bangalore (1990).
132.
C. C. Torardi, M. A. Subramanian, J. Gopalakrishnan, A. W. Sleight, D. E. Cox
and A. I. Goldman
Structure of Pr2CuO4
Amer. Cryst. Assocn. Annual Meeting 16, 108 (1988).
27
131.
M. A. Subramanian, J. Gopalakrishnan, C. C. Torardi, T. R. Askew, R. B.
Flippen, A. W. Sleight, J. J. Lin and S. J. Poon
Superconductivity and magnetic behaviour in La2-xNaxCuO4
Science 240, 495 (1988).
130.
M. A. Subramanian, C. C. Torardi, J. C. Calabrese, J. Gopalakrishnan, K. J.
Morrissey, T. R. Askew, R. B. Flippen, U. Chowdhry and A. W. Sleight
A new high temperature superconductor: Bi2Sr3-xCaxCu2O8+y
Science 239, 1015 (1988).
129.
C. C. Torardi, M. A. Subramanian, J. C. Calabrese, J. Gopalakrishnan, K. J.
Morrissey, T. R. Askew, R. B. Flippen, U. Chowdhry and A. W. Sleight
Crystal structure of Tl2Ba2Ca2Cu3O10: A 125 K superconductor
Science 240, 631 (1988).
128.
M. A. Subramanian, C. C. Torardi, J. Gopalakrishnan, P. L. Gai, J. C.
Calabrese, T. R. Askew, R. B. Flippen and A. W. Sleight
Bulk superconductivity up to 122 K in the Tl-Pb-Sr-Ca-Cu-O system
Science 242, 249 (1988).
127.
M. A. Subramanian, J. C. Calabrese, C. C. Torardi, J. Gopalakrishnan, T. R.
Askew, R. B. Flippen, K. J. Morrissey, U. Chowdhry and A. W. Sleight
Crystal structure of the high temperature superconductor Tl2Ba2CaCu2O8
Nature 332, 420 (1988).
126.
Y. J. Uemura et al. (J. Gopalakrishnan is an author of this paper).
Absence of magnetic order in (Ba, K) BiO3
Nature 335, 151 (1988).
125.
G. M. Luke et al. (J. Gopalakrishnan is an author of this paper).
Studies of static magnetic order in electron superconductors and their parent
compounds
Nature 338, 49 (1989).
124.
W. Dmowksi, B. H. Toby, T. Egami, M. A. Subramanian, J.Gopalakrishnan
and A.W. Sleight
28
Short-range ordering due to displacements of thallium and oxygen atoms in super
conducting Tl2Ba2CaCu2O8 observed by pulsed-neutron scattering
Phys. Rev. Lett. 61, 2608 (1988).
123.
Y. J. Uemura et al. (J. Gopalakrishnan is an author of this paper).
Universal correlation between Tc and n/m* (carrier density over effective
mass) in high Tc cuprate superconductors
Phys. Rev. Lett. 62, 2317 (1989).
122.
C. C. Torardi, M. A. Subramanian, J. C. Calabrese, J. Gopalakrishnan, E. M.
McCarron, K. J. Morrissey, T. R. Askew, R. B. Flippen, U. Chowdhry and A.
W. Sleight
Structures of the superconducting oxides Tl2Ba2CuO6 and Bi2Sr2CuO6
Phys. Rev. B 38, 225 (1988).
121.
J. J. Lin, E. L. Benitez, S. J. Poon, M. A. Subramanian, J. Gopalakrishnan and
A. W. Sleight
Superconducting properties of single-crystal Bi2Sr2CaCu2O8+y
Phys. Rev. B 38, 5095 (1988).
120.
D. E. Cox, C. C. Torardi, M. A. Subramanian, J. Gopalakrishnan and A. W.
Sleight
Structure refinements of superconducting Tl2Ba2CaCu2O8 and Tl2Ba2Ca2Cu3O10
from neutron diffraction data
Phys. Rev. B 38, 6624 (1988).
119.
B. X. Yang et al. (J. Gopalakrishnan is an author of this paper)
Static magnetic order in Bi2Sr2YCu2Ox and spin freezing in Bi2SrYCaCu2Ox
detected by muon spin rotation
Phys. Rev. B 39, 847 (1989).
118.
B. D. Biggs, M. N. Kunchur, J. J. Lin, S. J. Poon, T. R. Askew, R. B. Flippen,
M.A. Subramanian, J. Gopalakrishnan and A.W. Sleight
Flux Creep and critical current anisotropy in Bi2Sr2CaCu2O8+y
Phys. Rev. B 39, 7309 (1989).
29
117.
B. J. Sternlieb et al. (J. Gopalakrishnan is an author of this paper)
The magnetic and superconducting phase diagram of Bi2Sr3-xYxCu2O8+y as
determined by muon spin rotation
Phys. Rev. B 40, 11320 (1989).
116.
D. E. Cox, A. I. Goldman, M. A. Subramanian, J. Gopalakrishnan and A. W.
Sleight
A neutron powder diffraction study of the structure and antiferromagnetic
ordering in Pr2CuO4
Phys. Rev. B 40, 6998 (1989).
115.
Y. J. Uemura et al. (J. Gopalakrishnan is an author of this paper).
Muon SR studies of high Tc superconductivity
J. Physique 49, C8-2087(1988).
114.
M. A. Subramanian, C. C. Torardi, J. Gopalakrishnan, J. C. Calabrese, K. J.
Morrissey, T. R. Askew, R. B. Flippen, U. Chowdhry, A. W. Sleight, J. J. Lin and
S. J. Poon
New Oxide superconductors
Physica C 153-155, 608 (1988).
113.
M. A. Subramanian, J. Gopalakrishnan, C. C. Torardi, P. L. Gai, E. D.
Boyes, T. R. Askew, R. B. Flippen, W. E. Farneth and A. W. Sleight
Superconductivity near liquid nitrogen temperature in the Pb-Sr-R-Ca-Cu-O
system (R=Y or rare earth)
Physica C 157, 124 (1989).
112.
C. C. Torardi, M. A. Subramanian, J. Gopalakrishnan and A. W. Sleight
Alkali-metal substituted La2CuO4: Structures of La2-xMxCuO4 (M=Na, K; x=0.2)
Physica C 158, 465 (1989).
111.
C. C. Torardi, J. B. Parise, M. A. Subramanian, J. Gopalakrishnan and A. W.
Sleight
Oxygen nonstoichiometry in copper oxide based superconductors and related
systems: Structure of nonsuperconducting Bi2Sr3-xYxCu2O8+y (x= 0.6-1.0)
Physica C 157, 115 (1989).
30
110.
J. B. Parise, C. C. Torardi, M. A. Subramanian, J. Gopalakrishnan, A. W.
Sleight and E. Prince
Superconducting Tl2Ba2CuO6+x: A high resolution neutron powder and single
crystal x-ray diffraction investigation
Physica C 159, 239 (1989).
109.
J. B. Parise, P. L. Gai, M. A. Subramanian, J. Gopalakrishnan and
A. W. Sleight
The superconductors (Tl, Pb) Sr2CaCu2O7 and (Tl, Pb) Sr2Ca2Cu3O9: Neutron
powder diffraction, high resolution electron microscopy and x-ray absorption
studies.
Physica C 159, 245 (1989).
108.
P. L. Gai, M. A. Subramanian, J. Gopalakrishnan and E. D. Boyes
Microstructure and microchemistry of defects and interfaces in Tl2Ba2Ca2Cu4O12,
TlBa2Ca2Cu5O13 and (Tl, Pb)Sr2Can-1CunO2n+3 oxide superconductors
Physica C 159, 801 (1989).
107.
J. B. Parise, J. Gopalakrishnan, M. A. Subramanian and A. W. Sleight
Superconducting Tl2Ba2CuO6: The orthorhombic form
J. Solid State Chem. 76, 432 (1988).
106.
M. A. Subramanian, J. B. Parise, J. C.
J. Gopalakrishnan and A.W. Sleight
Calabrese, C. C.
Torardi,
Crystal structure of TlBa2Ca2Cu3O9
J. Solid State Chem. 77, 192 (1988).
105.
M. A. Subramanian, A. R. Strzelecki, J. Gopalakrishnan and A. W. Sleight
Superconductor-to-insulator transition in the Bi2Sr3-xYxCu2O8+y
J. Solid State Chem. 77, 196 (1988).
104.
J. Gopalakrishnan, M. A. Subramanian and A. W. Sleight
Superconducting and nonsuperconducting analogs of Bi2Sr2CaCu2O8: The role
of electronegativity
J. Solid State Chem. 80, 156 (1989).
31
103.
M. A. Subramanian, J. Gopalakrishnan and A. W. Sleight
Depression
of
Tc
with
La2-xSrxCuO4 superconductors
rare
earth-substitution
for
La
in
J. Solid State Chem. 83, 413 (1990).
102.
J. Gopalakrishnan, M. A. Subramanian, C. C. Torardi, J. P. Attfield and A. W.
Sleight
Properties and structures of R2-xAxCuO4: R=La, Pr and Nd; A=Sr, Pb and Cd.
Mater. Res. Bull. 24, 321 (1989).
101.
M. A. Subramanian, J. Gopalakrishnan and A. W. Sleight
New layered perovskites: ABiNb2O7 and APb2Nb3O10 (A = Rb or Cs).
Mater. Res. Bull. 23, 837 (1988).
100.
A. W. Sleight, J. Gopalakrishnan, C. C. Torardi and M. A. Subramanian
High Tc Copper oxide superconductors of thallium, bismuth and lead
Phase Transitions 19, 149(1989).
99.
M. A. Subramanian, J. Gopalakrishnan, C. C. Torardi, J. C. Calabrese, K. J.
Morrissey, J. Parise, P. L. Gai and A. W. Sleight
Synthesis and structure-property relationships of Tl and Bi containing copper
oxide superconductors
In Advances in Superconductivity (Kitazawa and Ishiguro, eds.) SpringerVerlag, Tokyo (1989).
98.
C. C. Torardi, M. A. Subramanian, J. Gopalakrishnan, E. M. McCarron, J. C.
Calabrese, K. J. Morrissey, T. R. Askew, R. B. Flippen, U. Chowdhry, A. W.
Sleight and D. E. Cox
Synthesis, structure and properties of A2B2Can-1CunO2n+4 superconductors (A/B =
Bi/Sr or Tl/Ba and n =1, 2, 3)
In High Temperature Superconductivity : The First Two Years (ed. R.M.
Metzger) Gordon and Breach, New York (1989).
97.
P. L. Gai, M. A. Subramanian, J. Gopalakrishnan and E. D. Boyes
Grain boundary atomic structure and microscopy of Bi-Sr-Ca-Cu-O, (Tl, Pb) -SrCa-Cu-O and Pb-Sr-R (rare earth)-Ca-Cu-O bulk oxide superconductors
32
Proc. Materials Research Society Symposium (1989).
96.
B. H. Toby, W. Dmowksi, T. Egami, J. D. Jorgensen, M. A. Subramanian,
J. Gopalakrishnan, A. W. Sleight and J. B. Parise
Ordering in Tl2CaBa2Cu2O8 and Tl2Ba2CuO6 studies by pair distribution function
and Rietveld analysis
Physica C 162-164, 101(1989).
95.
B. J. Sternlieb et al. (J. Gopalakrishnan is an author)
Muon spin rotation studies of flux mobility in the mixed state of Bi2Sr2CaCu2O8
Physica C 162-164, 679 (1989).
94.
G. M. Luke et al. (J. Gopalakrishnan is an author)
Static magnetic order in electron superconductor related compounds
Physica C 162-164, 825 (1989).
93.
V. Bhat, A. K. Ganguli, K. S. Nanjundaswamy, R. A. Mohan Ram,
J. Gopalakrishnan and C. N. R. Rao
Approaches to the synthesis of high Tc superconducting oxides in the La-BaCu-O and Y-Ba-Cu-O systems
Phase Transitions 10, 87(1987).
92.
C. N. R. Rao, P. Ganguly, J. Gopalakrishnan and D. D. Sarma
Mechanism of high temperature superconductivity in YBa2Cu3O7: Crucial role of
oxygen
Mater. Res. Bull. 22, 1159 (1987).
91.
J. Gopalakrishnan and V. Bhat
A convenient method for the synthesis of oxide bronzes of tungsten,
molybdenum and vanadium: Characterisation of new hexagonal bronzes
Proc. USSR Academy of Sciences Siberian Branch, p.30 (1987).
90.
A. K. Ganguli, L. Ganapathi, J. Gopalakrishnan and C. N. R. Rao
Low temperature synthesis of novel layered alkali metal MoO3 – bronzes and
hexagonal bronzes of the type KyW1-xMoxO3
33
J. Solid State Chem. 74, 22¸ (1988).
89.
K. S. Nanjundaswamy, N. Y. Vasanthacharya, J. Gopalakrishnan and C. N. R.
Rao
A convenient synthesis of the Chevrel phases MxMo6S8 (M = Cu, Pb, La or Gd)
Inorg. Chem. 26, 4286 (1987).
88.
J. Gopalakrishnan and V. Bhat
A2Ln2Ti3O10 (A=K or Rb; Ln=La or rare earth): A new series of layered
perovskites exhibiting ion exchange
Inorg. Chem. 26, 4299 (1987).
87.
V. Bhat and J. Gopalakrishnan
HNbWO6 and HTaWO6 Novel layered oxides related to the rutile structure.
Synthesis and investigation of ion-exchange and intercalation behaviour
Solid State Ionics 26, 25 (1988).
86.
J. Gopalakrishnan and K. S. Nanjundaswamy
New transition metal silicoselenides possessing CdI2 – type structure
Mater. Res. Bull. 23, 107 (1988).
85.
J. Gopalakrishnan and V. Bhat
Oxidative extraction and ion-exchange of lithium in Li2MoO3:
Synthesis of Li2-xMoO3 (0 < x < 2.0) and H2MoO3
Mater. Res. Bull. 22, 761 (1987).
84.
J. Gopalakrishnan, V. Bhat and B. Raveau
AILaNb2O7: A new series of layered Perovskites exhibiting ion-exchange
and intercalation behaviour
Mater. Res. Bull. 22, 413 (1987).
83.
K. S. Nanjundaswamy and J. Gopalakrishnan
Synthesis and characterisation of Ti5Te4 type molybdenum cluster compounds,
AxMo5As4 (A = Cu, Al, Ga)
J. Chem. Soc. Dalton 1 (1988).
82.
K. S. Nanjundaswamy and J. Gopalakrishnan
34
Formation of novel molybdenum and tungsten sulphides by reduction of MoS2
and WS2. A new route to Chevrel phases.
J. Solid State Chem. 68, 188 (1987).
81.
A. K. Ganguli and J. Gopalakrishnan
Magnetic properties of Ca2Fe2-xMnxO5
Proc. Indian Acad. Sci. (Chem. Sci.) 97, 627 (1986).
80.
J. Gopalakrishnan
Low-temperature synthesis of novel metal oxides by topochemical reactions
Proc. Indian Natl. Science Academy 52A, 48 (1986).
79.
J. Gopalakrishnan
Synthesis and structures of some interesting oxides of bismuth
Proc. Indian Acad. Sci. (Chem. Sci.) 96, 449 (1986).
78.
V. Bhat and J. Gopalakrishnan
HNbWO6 and HTaWO6 : Novel oxides related to ReO3 formed by ion-exchange
of rutile type LiNbWO6 and LiTaWO6
J. Solid State Chem. 63, 278 (1986).
77.
K. Vidyasagar, L. Ganapathi, J. Gopalakrishnan and C. N. R. Rao
Novel oxygen vacancy ordered phases of Ca2Fe2-xMnxO5 prepared by topotactic
reduction of the perovskite oxide Ca3Fe3-xMnxO9-y
J. Chem. Soc. Chem. Commun. 449 (1986).
76.
L. Ganapathi, A. Ramanan, J. Gopalakrishnan and C. N. R. Rao
A study of MoO3, WO3 and their solid solutions prepared by topotactic
dehydration of the monohydrates
J. Chem. Soc. Chem. Commun. 62 (1986).
75.
V. Bhat and J. Gopalakrishnan
A new method for the synthesis of oxide bronzes of tungsten, molybdenum and
vanadium
J. Chem. Soc. Chem. Commun. 1644 (1986).
35
74.
C. N. R. Rao, J. Gopalakrishnan, K. Vidyasagar, A. K. Ganguli, A. Ramanan
and L. Ganapathi
Novel metal oxides prepared by ingenious synthetic routes
J. Mater. Res. 1, 280 (1986).
73.
J. Gopalakrishnan
Insertion/extraction of lithium and sodium in transition metal oxides and
chalcogenides
Bull. Mater. Sci. 7, 201 (1985).
72.
R.A. Mohanram and J. Gopalakrishnan
Mixed valency in the high temperature phases of transition metal molybdates,
AMoO4 (A = Fe, Co, Ni)
Proc. Indian. Acad. Sci. (Chem. Sci.) 96, 291 (1986).
71.
A. Ramanan, J. Gopalakrishnan and C. N. R. Rao
Relative stabilities of layered perovskite and pyrochlore structures in transition
metal oxides containing trivalent bismuth
J. Solid State Chem. 60, 376 (1985).
70.
A. Ramanan and J. Gopalakrishnan
Low-temperature preparation of sillenite phases in the Bi-M-O (M=Mn, Fe, Co)
systems
Indian J. Chem. 24 A, 594 (1985).
69.
L. Ganapathi, J. Gopalakrishnan and C. N. R. Rao
Barium hexaferrite (M-phase) exhibiting superstructure
Materials Res. Bull. 19, 669 (1984).
68.
K. Vidyasagar, A. Reller, J. Gopalakrishnan and C. N. R. Rao
Oxygen vacancy ordering in the superlattices of the two novel oxides,
La2Ni2O5 and La2Co2O5 prepared by low temperature reduction of the parent
perovskites
J. Chem. Soc. Chem. Commun. 7 (1985).
36
67.
K. Vidyasagar, J. Gopalakrishnan and C. N. R. Rao
Synthesis of complex metal oxides using hydroxide, cyanide and nitrate solid
solution precursors
J. Solid State Chem. 58, 29 (1985).
66.
K. Vidyasagar, J. Gopalakrishnan and C. N. R. Rao
A convenient route for the synthesis of complex metal oxides employing solid
solution precursors
Inorg. Chem. 23, 1206 (1984).
65.
J. Gopalakrishnan
Preparative solid state chemistry: Recent developements
Proc. Indian Acad. Sci. (Chem. Sci.) 93, 421 (1984).
64.
D. A. Jefferson, M. K. Uppal, D. J. Smith, J, Gopalakrishnan, A.Ramanan and
C. N. R. Rao
Intergrowth tungsten bronzes of bismuth
Mater. Res. Bull. 19, 535 (1984).
63.
A. Ramanan, G. N. Subbanna, J. Gopalakrishnan and C. N. R. Rao
Novel phases and structural transitions in chromium and
bismuth tungstates, Bi 2-x MxWO6 (M = Cr, Fe)
Rev. Chim. Minerale 20, 576 (1983).
62.
iron substituted
D. A. Jefferson, M. K. Uppal, J. Gopalakrishnan, A. Ramanan and
Rao
High Resolution electron microscopic investigations of
tungsten oxides
C. N. R
layered bismuth-
Solid State Chemistry 1982, Elsevier (1983) : p. 409
61.
A. Ramanan, J. Gopalakrishnan, M. K.Uppal,
C. N. R. Rao
D. A.Jefferson and
Bismuth tungsten bronzes: A study of intergrowth phases and related aspects
Proc. Roy. Soc. London A 395, 127 (1984).
60.
J. Gopalakrishnan, A. Ramanan, C. N. R. Rao, D. A. Jefferson and D. J.
Smith
37
A homologous series of recurrent intergrowth structures of the type
Bi 4A m+n-2B m+nO3(m+n)+6 formed by oxides of the Aurivillius family
J. Solid State Chem. 55, 101 (1984).
59.
A. Manthiram and J. Gopalakrishnan
On the valence state of cerium in Ce2MoO6
J. Less-Common Metals 99, 107 (1984).
58.
K. S. Nanjundaswamy and J. Gopalakrishnan
Preparation, structure and magnetic properties of
La 3MFeS7 (M = Mg, Mn, Fe, Co, Ni or Zn)
isostructural La 3MAlS7 and
J. Solid State Chem. 49, 51 (1983).
57.
J. Gopalakrishnan and K. S. Nanjundaswamy
Transition metal chalcogenides exhibiting quasi-one-dimensional behaviour
Bull. Mater. Sci. 5, 287 (1983).
56.
T. Murugesan and J. Gopalakrishnan
Rare earth copper sulphides
Indian J. Chem. 22A, 469 (1983).
55.
K. Vidyasagar and J. Gopalakrishnan
AThV2O6 (A = Ca, Sr) perovskites
Indian J. Chem. 21A, 716 (1982).
54.
A. Ramanan and J. Gopalakrishnan
Perovskite and Weberite related phases in
Nd, Gd or Y)
the Na-Ln-Bi-O system (Ln = Ln,
Rev. Chim. Minerale 19, 225 (1982).
53.
D. A. Jefferson, J. Gopalakrishnan and A. Ramanan
Structural adaptibility in the Bi2O3-WO3 system: Higher
homologous series Bi 2WnO3n+3
Mater.Res. Bull. 17, 269 (1982).
38
members of the
52.
K.Vidyasagar and J. Gopalakrishnan
Li xVO2 (0< x <1) : A new series of layered oxides
J. Solid State Chem. 42, 217 (1982).
51.
T. Murugesan, S. Ramesh, J. Gopalakrishnan and C. N. R. Rao
Ternary vanadium sulphides, MxVS2 (M =Fe, Co, Ni)
J. Solid State Chem. 44, 119 (1982).
50.
T. Murugesan and J. Gopalakrishnan
Amorphous MoS3 and Ax MoS3 (A =Li or Na; 0 < x < 4)
Proc. Indian Acad Sci. (Chem. Sci.) 91, 7 (1982).
49.
J. Gopalakrishnan
Preparation of transition metal sulphides
Bull. Mater. Sci. 3, 271 (1981).
48.
N. K. Appandairajan, B. Viswanathan and J. Gopalakrishnan
Lithium substituted cobalt oxide spinels:Li x M1-xCo 2O4 (M = Co or Zn)
J. Solid State Chem. 40, 117 (1981).
47.
A. Ramanan, J.Gopalakrishnan and C. N. R. Rao
Ternary bismuth oxides, Bi26-xM xO40-y related to gamma- Bi2 O 3
Mater. Res. Bull. 16, 169 (1981).
46.
T. Murugesan, S. Ramesh, J. Gopalakrishnan and C. N. R. Rao
Rare earth transition metal sulphides, LnMS3
J. Solid State Chem. 38, 165 (1981).
45.
N. K. Appandairajan, B. Viswanathan and J. Gopalakrishnan
Magnetic properties of Co3-xNi xO4
Rev. Roumaine Phys. 25, 207 (1980).
44.
J. Gopalakrishnan and A. Manthiram
39
Topochemically-controlled hydrogen reduction of scheelite related rare earth
molybdates
J. Chem. Soc. Dalton, 668 (1981).
43.
A. Manthiram and J.Gopalakrishnan
Fluorite-related Ln2Mo2O 7 oxides in the Ln2O3-MoO2 ( Ln = Rare earth) system
Indian J.Chem. 19A, 1042 (1980).
42.
A. Manthiram and J. Gopalakrishnan
New A2+ Mo4+ O3 oxides with defect spinel structure
Mater. Res. Bull. 15, 207 (1980).
41.
A. Manthiram, P. R. Sarode, W. H. Madhusudan, J. Gopalakrishnan and
C. N. R. Rao
X-ray spectroscopic study of chromium, nickel and molybdenum compounds
J. Phys. Chem. 84, 2200 (1980).
40.
J. Gopalakrishnan, N. K. Appandairajan and B. Viswanathan
Co3-xZnxO4 (0 < x < 1) spinel oxides
Proc. Indian Acad. Sci. (Chem. Sci. 88A, 217 (1979).
39.
N. K. Appandairajan and J. Gopalakrishnan
A study of Co3-xNixO4 (0 < x < 1)
Proc. Indian Acad Sci. (Chem. Sci. 87A, 115 (1978).
38.
T. Murugesan, P. R. Sarode, J. Gopalakrishnan and C. N. R. Rao
A study of copper compounds by X-ray absorption spectroscopy
J. Chem. Soc. Dalton 837 (1980).
37.
J. Gopalakrishnan, T. Murugesan, M. S. Hegde and C. N. R. Rao
Study of transition metal monosulphides by photoelectron spectroscopy
J. Phys. C12, 5255 (1979).
36.
A. Manthiram and J. Gopalakrishnan
40
Studies on Ln2MoO5 oxides
J. Less-common metals 68,167 (1979).
35.
N. Ramdass, J. Gopalakrishnan and M. V. C. Sastri
Studies on magnesium- and titanium-substituted LaCoO3
J. Less-Common Metals 65, 129 (1979).
34.
L. Ganapathi, G. N. Subbanna, J. Gopalakrishnan and C. N. R. Rao
An electron microscopic investigation of oxides related to beta alumina
J. Mater. Sci. 20, 1105 (1985).
33.
J. Gopalakrishnan and M. S. Hegde
PES study of semiconductor- -metal transition in NiS
Indian J. Pure and Applied Phys. 16, 864 (1978).
32.
A. Manthiram and J. Gopalakrishnan
Preparation and structure of Ln2MoO5 oxides (Ln =Rare earth)
Proc. Indian Acad. Sci. (Chem. Sci.) 87A, 267 (1978).
31.
J. Gopalakrishnan, R. P. Viswanath and K. V. Govindan Kutty
Rhodium-catalysed reduction of vanadium pentoxide and tungsten trioxide
hydrogen
by
J. Appl. Chem. Biotechnology 28, 751 (1978).
30.
N. Ramadass, J. Gopalakrishnan and M. V. C. Sastri
Preparation and characterisation of La2TiMO6 (M = Co, Ni, Cu, Zn) perovskites
J. Inorg. Nucl. Chem. 40, 1453 (1978).
29.
J. Gopalakrishnan, G. Colsmann and B. Reuter
Studies on La2-xSrxNiO4 (0 < x <1) system
J. Solid State Chem. 22, 145 (1977).
28.
J. Gopalakrishnan, G. Colsmann and B. Reuter
41
A study of LaNi 1-xCoxO3 system
Z. Anorg. u. Allgem. Chem. 424, 155 (1976).
27.
T. Palanisamy, J. Gopalakrishnan and M. V. C. Sastri
A new lanthanum vanadium oxide bronze
J. Indian Chem. Soc. LII, 900 (1975).
26.
N. Ramadass, T. Palanisamy. J. Gopalakrishnan, G. Aravamudan and M. V. C.
Sastri
Some ABO3 oxides with defect pyrochlore structure
Solid State Commun. 17, 545 (1975).
25.
T. Palanisamy, J. Gopalakrishnan and M. V. C. Sastri
A mixed valence vandium spinel of zinc
J. Inorg. Nucl. Chem. 38, 1372 (1976).
24.
T. Palanisamy, J. Gopalakrishnan and M. V. C. Sastri
Studies on ternary oxides of AVO3 composition
Z. Anorg. u. Allgem. Chem. 415, 275 (1975).
23.
K. R. Krishnamurthy, J. Gopalakrishnan, G. Aravamudan and M. V. C Sastri
Studies on the formation of zinc ferrite
J. Inorg. Nucl. Chem. 36, 561 (1974).
22.
T. Palanisamy, J. Gopalakrishnan and M. V. C. Sastri
Preparation and studies of a new ammonium vanadium bronze, (NH4)xV2O5
J. Solid State Chem. 9, 273 (1974).
21.
M. V. C. Sastri, G. Aravamudan, J. Gopalakrishnan and N. Ramadass
Perovskite type zirconate from thermal decomposition of tetra-oxalato
zirconates (IV)
Proc. D A E Symposium in Chemistry, vol.2, p. 325 (1972).
20.
G. Aravamudan, J. Gopalakrishnan and M. R. Udupa
Preparation and properties of potassium trisoxalatoferrate (III) - A laboratory
42
exercise
J. Chem. Education 51, 121 (1974).
19.
B. Viswanathan, J. Gopalakrishnan, V. Srinivasan and M. V. C. Sastri
Thermal decomposition of ferrous and manganous oxalates in vacuum
J. Thermal Analysis 3, 429 (1971).
18.
J. Gopalakrishnan, T. Palanisamy, M. V. C. Sastri and V. Srinivasan
Preparation and thermal decomposition of oxovanadium oxalates of barium
Proc. D A E symposium in chemistry, Vol. 1, p.183 (1970).
17.
T. Palanisamy, J. Gopalakrishnan, B. Viswanathan, V. Srinivasan, M. V. C.
Sastri
Kinetics of thermal decomposition of some metal oxalates
Thermochim. Acta 2, 265 (1971).
16.
J. Gopalakrishnan, B.Viswanathan and V. Srinivasan
Preparation and thermal decomposition of some oxomolybdenum (VI) oxalates
J. Inorg. Nucl. Chem. 32, 2565 (1970).
15.
V. V. Savant, J. Gopalakrishnan and C. C. Patel
Studies of some metal monothiobenzoates
Inorg. Chem. 9, 748 (1970).
14.
J. Gopalakrishnan, D. N. Sathyanarayana and C. C. Patel
A modified Wolfsberg-Helmholz
some octahedral complexes
molecular
orbital
Indian J. Chem. 7, 77 (1969).
13.
J. Gopalakrishnan, V. V. Savant and C. C. Patel
A volumetric method for the determination of sulphoxides
Z. Anal. Chem. 238, 273 (1968).
12.
J. Gopalakrishnan and C. C. Patel
43
calculation
on
Dimeric Copper (II) levulinate hydrate
Inorg. Chem. 6, 2111 (1967).
11.
J. Gopalakrishnan and C. C. Patel
Diphenyl sulphoxide complexes of some divalent metal ions
Inorg. Chem. Acta 1, 165 (1967).
10.
J. Gopalakrishnan and C. C. Patel
Covalency in pentakisantipyrine Copper (II) perchlorate
Indian J. Chem. 5, 389 (1967).
9.
J. Gopalakrishnan and C. C. Patel
Pseudotetrahedral complexes of Cobalt (II) and Copper (II) with antipyrine
Indian J. Chem. 5, 364 (1967).
8.
J. Gopalakrishnan, A. Ravi and C. C. Patel
The donor properties of antipyrine
Indian J. Chem. 5, 356 (1967).
7.
A. Ravi, J. Gopalakrishnan and C. C. Patel
Studies of pentakisantipyrine Copper (II) perchlorate
Bull. Chem. Soc. Japan 40, 791 (1967).
6.
C. N. R. Rao and J. Gopalakrishnan
Synthesis of complex metal oxides by novel routes
Acc. Chem. Res. 20, 228 (1987).
5.
J. Gopalakrishnan
Layered oxides derived from metal-oxygen octahedra: Synthesis, structure and
properties
Reviews in Solid State Science 1, 515 (1988).
4.
C. N. R. Rao, K. J. Rao and J. Gopalakrishnan
44
Physical Chemistry of Solids
Annual Reports of the Royal Society of Chemistry C, London (1985).
3.
C. N. R. Rao, J. Gopalakrishnan and K. Vidyasagar
Superstructures, ordered defects and nonstoichiometry in metal oxides of
perovskite and related structures
Indian J. Chem. 23A, 265-284 (1984).
2.
A. Manthiram and J. Gopalakrishnan
Lower valence molybdenum oxides: Crystal Chemistry and electronic properties
Reviews in Inorganic Chemistry 6, 1-68 (1984)
1.
J. Gopalakrishnan and C.C. Patel
Coordination compounds of sulphoxides - A Review
J. Sci. Ind. Res (India) 27, 475 (1968).
45
Books and Special publications
1.
C. N. R. Rao and J. Gopalakrishnan
NEW DIRECTIONS IN SOLID STATE CHEMISTRY
Cambridge Solid State Science Series
Cambridge University Press (1986)
Paperback edition (1989)
Russian edition (1990)
Chinese edition (1995).
2.
C.N.R. Rao and J. Gopalakrishnan
NEW DIRECTIONS IN SOLID STATE CHEMISTRY
Second Edition
Cambridge University Press (1997).
3.
J. Gopalakrishnan and G. U. Kulkarni (Eds.)
ADVANCES IN CHEMISTRY
(A Selection of C. N. R. Rao’s publications 1994-2003)
World Scientific, Singapore (2003).
4.
J. Gopalakrishnan and C. N. R. Rao (Eds.)
Solid State Chemistry – Proceedings of Winter Workshop (1986)
Proceedings of Indian Academy of Sciences (Chem. Sci.) 96, 391-606 (1986).
5.
J. Gopalakrishnan and Ram Seshadri (Eds.)
Solid State and Materials Chemistry
Proceedings of Indian Academy of Sciences (Chem. Sci.) 113, 361-702
(2001).
6.
G. U. Kulkarni, B. Bagchi and J. Gopalakrishnan (Eds.)
Emerging Directions in Chemical Sciences
Proc. Indian Acad. Sci. (Chem. Sci.) 115, 321-788 (2003).
46