Inputs for the month of December '14
1. Name & Citation of the Publication: Physical Review E Rapid Comm.( to appear)
Title: Morphological evolution of domains in spinodal decomposition
Authors: Charu Datt, Sumesh P. Thampi and Rama Govindarajan ( TCIS)
Abstract :Domain growth in spinodal decomposition is usually described by a single timeevolving length scale. We show that the evolution of morphology of domains is non-monotonic.
The domains elongate rapidly at first and then, with the help of hydrodynamics, domains return
to a more circular shape. The initial elongation phase does not alter with hydrodynamics. A small
deviation from critical composition changes the morphology dramatically.
2. Name & Citation of the Publication: Organometallics 2015, 34, DOI: 10.1021/om501286g
Title: A Molecular Complex with a Formally Neutral Iron Germanide Motif (Fe2Ge2)
Authors: Anukul Jana ( TCIS), Volker Huch, Henry S. Rzepa, and David Scheschkewitz
Abstract: We report the synthesis and isolation of a stable complex containing the formally
neutral Fe2Ge2 motif, which is stabilized by the coordination of an N-heterocyclic carbene to the
germanium and carbon monoxide to the iron center. [(NHCiPr2Me2)GeFe(CO)4]2 is obtained by
reduction of the NHCiPr2Me2-coordinated dichlorogermylene adduct with Fe(CO)4, which in
turn is obtained from reaction of Fe2(CO)9 with GeCl2·NHCiPr2Me2 (NHCiPr2Me2 = 1,3diisopropyl-4,5-dimethylimidazol-2-ylidene). The solid state
structure of the title compound reveals two distinct
coordination modes for the Fe(CO)4 fragments: bridging (type) and terminal (-type). In solution, the rapid equilibrium
between the two modes was resolved by NMR at −35°C.
Reaction with propylene sulfide at room-temperature affords
the sulfide-bridged digermanium complex with two terminal Fe(CO)4 moieties.
Outreach :
Sawaal-Jawaab, Monthly conversations on Science
Talk Title: Learning new physics, one grain at a time
Date: Saturday Dec. 13, 2014
A well attended conversation between Guest scientist, Prof. Shankar Ghosh of the Tata Institute
of Fundamental Research (TIFR) Mumbai with Dr. Shubha Tewari of TIFR Hyderabad to
demonstrate experiments that highlighted the unusual and ill-understood properties of granular
materials, and showcased the thought and discussion that goes into analysing them and
elucidating the science behind the observed phenomena.