GAS SENSOR CONTROL ON HCl
S.S. Ryasenskii, I.I. Rybakob, B.A. Kustarev
Tver State University
Chair of inorganic and analytical chemistry
Possibility of production of a gas sensor on HCl on the basis of a polyaniline sheeting.
Keywords: sensor, polyaniline, electroconductive polymer.
PIEZOQUARTZ GAS SENSOR
S. S. Ryasenskii, N. A. Gorbacheva
Tver state University, Tver
Chair of inorganic and analytical chemistry
Proposed the design of the gas sensor based on quartz resonator. Shows the possibility of using it for
defining the content of ethanol, ethyl acetate and hexane in the air.
Keywords: sensor, resonator, quartz micro balances.
CHEMICAL EQUILIBRIUMS IN THE SYSTEM
CO2+ ION – HEPARIN – PROLINE
M.A. Feofanova, Yu.V. Frantseva, E.V. Zhuravlev, N.V. Baranova,
E.V. Potekha
Tver State Universitym
Chair of inorganic and analytical chemistry
Using PH-metry methods and mathematical modeling the interaction of high-molecular
heparin with Co2+ ions and proline in aqueous solution at 37 º C using 0.154 M NaCl is
studied. The formation of complex forms of different composition and stability is found.
Stability constants are defined.
Keywords: equilibrium constants, heparin, proline, biometals.
STUDY COMPLEX CALCIUM CATIONS WITH CARVEDILOL
M.A. Feofanova, V.V. Novikova, I.S. Tsvetkova
Tver state University
Chair of inorganic and analytical chemistry
PH-metry methods and mathematical modeling studied acid-base and complexing properties of
carvedilol (Kar) in aqueous solution at a temperature of 37 ˚ C, against 0.15 M NaCl. Installed
constantan dissociation carvedilol and metal complex.
Keywords: acid-base properties, carvedilol (Kar), calcium ion.
THERMAL PROPERTIES OF 1-DECYLPYRIDINIUM
SALTS WITH DIFFERENT ANIONS
N.I. Belotserkovets1, S.S. Ryasenskii2
Tver State University
1
Department of Physical Chemistry
2
Chair of inorganic and analytical chemistry
The thermal properties of 1-decylpyridinium ionic liquids (chloride, bromide, iodide, hydrogen sulfate
and p-toluenesulfonate) using TGA /DSC data were investigated. The mellting temperature, the
enthalpy of melting and the decomposition temperature were determined. The comparative
characteristic of phase transitions and the process of thermal degradation of the compounds are given.
It is found that the melting temperature, enthalpy of melting and the decomposition temperature
increase with increasing ionic radius of the anion. When anion contains the sulfo-group, a thermal
decomposition is an exothermic process, in contrast to salts with halide anions.
Keywords: 1-decylpyridinium salts, ionic liquids, thermal analysis, thermal decomposition, the
melting temperature, enthalpy of melting.
MECHANICAL PROPERTIES OF VARIOUS TYPES
OF CELLULOSE ACETATE MEMBRANES
I.P. Storozhuk1, G.E. Bordina2, N.P. Lopina2, R.N. Chirkov3,
V.V. Artamonov3.
1
Institute of Organoelement Compounds named after A.N. Nesmeyanov
Russian Academy of Sciences
Tver State Medical Academy
2
Department of Chemistry
3
Department of Surgery with the course optional Oncology
The mechanical properties of dry and water-swollen samples of cellulose acetate membranes brands
MFAS M-1, M-3 MFAS, MFAS P-4, MUSA-6P. It is shown that the strength characteristics in the
swollen state, hydrophilicity and porosity of the membrane to create a belt of the drainage device of
the studied samples is the most suitable reinforced membrane brand MUSA-6P.
Keywords: cellulose acetate membranes, hydrophilicity, porosity, strength.
INFLUENCE ON THE FACTIONS PIG MANURE NUTRIENT
REGIME OF SOD-PODZOLIC SOILS AND EFFICIENCY
ZERNOTRAVJANOGO CROP ROTATION LINKS
I.N. Baranovskiy, M.V. Babenko
Tver State Agricultural Academy
Department of Agricultural Chemistry, Soil Science and Agroecology
The results of studies on the effect of liquid and solid fractions of swine manure from the pig farm of
"Zavolzhskoye" made in pure form and in conjunction with straw on the nutrient status of sodpodzolic sandy loam soil and crop rotation productivity zernotravjanogo link.
Keywords: Feeding mode, sod-podzolic soil fertility, crop productivity, batteries, liquid and solid
fractions.
ANTICORROSIVE PROPERTIES OF SURFACE-ACTIVE SUBSTANCES ON THE
BASIS OF THE REPLACED IMIDAZOLINE
N.V. Verolaynen, V.E. Petrova, S.A. Temnikova, I.U. Egorova
L.I. Voronchikhina
Tver State University
Department of Organic Chemistry TSU
On a basis 2-alkilimidazolinov chlorides 2-alkyls-1,3-dietiloksikarbonilimidazoliniya, 2-alkyls-3etiloksikarbonilmetilimidazo-liniya, 2-alkilimidazolin-3-izobutiraty sodium are synthesized. Colloidal
and chemical and anticorrosive properties of studied connections are studied.
Keywords: imidazoline, 2-alkilimidazolinе, surface-active substances, superficial activity, corrosion
inhibitors.
COMPLEX SALTS BASED ON CATIONIC SURFACTANTS
AND RARE EARTH METALS
I.V. Kuzmina, I.U. Egorova
Tver State University
Department of Organic Chemistry
Obtained alkylpyridinium and ammonium tetrahlorgadolinaty, -lantonaty and -neodimaty. Some
properties of the synthesized complex salts.
Keywords: cationic surfactactants, lanthanides, complex salts, organometallic compounds.
STUDYING OF THE ELECTRONIC STRUCTURE OF ISOMERS
OF CARBOXYL RADICALS IN THE FRAMEWORK
«QUANTUM THEORY OF ATOMS IN MOLECULE»
E. M. Chernova1, V.V. Turovtsev1.2, M.Y. Orlov1,Yu. D. Orlov1
1
Tver state university
Tver state medical academy
2
The distribution of the electron density (ρ(r)) was found by DFT B3LYP/6-311++G(3df,3pd) and in
the framework of the "quantum theory of atoms in a molecule» (QTAIM) the ρ(r) of radicals
CH3(CH2)nC(O)O, where n = 0 ÷ 8, was investigated. Comparison with carboxylic acids was
performed, it is shown that the free valence in CH3(CH2)nC(O)O completely localized at the group
C(O)O●.
Keywords: quantum theory of atoms in molecule, electron density distribution, charges at the atoms,
spin density.
QUANTUM-MECHANICAL STUDY OF THE ELECTRONIC STRUCTURE OF NALKENES IN THE FRAMEWORK
OF «QUANTUM THEORY OF ATOMS IN MOLECULES»
E.M. Chernova1, V.N. Sitnikov1, V.V. Turovtsev1,2, Yu D. Orlov1
1
2
Tver state University
Tver state medical Academy
In the "quantum theory of atoms in molecule» (QTAIM) the electron density distribution (ρ(r)) of
molecular series CH2=CH-(CH2)n-CH3, where n = 0 ÷ 9, was studied. Equilibrium structures of
homologues and ρ(r) were found by the DFT B3LYP/6-311 + + G (3df, 3pd). Qualitative scale of
group electronegativities was proposed.
Keywords: n-alkenes, quantum theory of atoms in molecules, electron density, charges at atoms,
inductive effect, electronegativity, group contributions, additivity, transferability.
THE KINETICS OF HYDROLYTIC AND OXIDATIVE DISSOLUTION OF NICKEL
(II) SULPHIDE IN AN ACIDIC MEDIUM
A.I. Pichugina1, V.I. Lutsik1, N.A. Еpifanova2
1
The Tver State Technical University, Tver
Department of Chemistry
2
N. P. Ogarev's Mordovian State University, Saransk
Department of Analytical Chemistry
The kinetics of hydrolytic and oxidative dissolution of nickel(II) sulfide in an acidic medium was
studied using the rotating disc method and factor experimental design. The results of the investigation
of the composition and the structure of synthetic NiS are presented. The comparative analysis of the
influences of acid’s concentration, temperature, disc rotation frequency as well as the durations of
measurements on the specific rate of nickel dissolution in the media of nitric acid and sulfuric acid is
carried out. The modes of interaction were determined, the limiting stages of dissolution were
identified, and the kinetic parameters of nickel sulfide dissolution were calculated. The mechanisms of
the interaction of nickel sulfide with acids and hydrogen peroxide are proposed. It is shown that the
reaction of sulfide with an acid is preceded by a hydration stage.
Keywords: Nickel sulfides (II), millerite, dissolution rate, reaction orders, polynomial model, apparent
activation energy, reaction mechanism.
CRESOL ISOMERS INFLUENCE ON COOPERATION IN NON-AQUEOUS SYSTEMS
TRIPLE PHOSPHORIC ACID
L.G. Shirshina
Tver State Technical univeritet
The effect of o-, m-, n- cresol isomers by reacting the components in the ternary liquid
heterogeneous system with orthophosphoric acid.
Keywords: orthophosphoric acid, cresol isomers, reacting the components.
THEORY-GRAPH APPROACH IN THE STUDY OF CORRELATIONS “STRUCTURE
– PROPERTY” ALKYNES
M.G. Vinogradov, Yu.G. Papulov
Tver State University
Department of physical chemistry
The represented numerical calculations of the enthalpy of formation of substituted alkilsilanes. Made
the prediction. The results are agreement with experiment.
Keywords:, topological indices, enthalpy of formation, numerical calculations.
BOND DISSOCIATION ENERGIES IN
SULFUR-ORGANIC CONNECTIONS.
NUMERICAL CALCULATIONS AND MAIN REGULARITIES
M.G. Vinogradova, Yu.G. Papulov, D.A. Glushonok, E.A. Seryogin
Tver State University
Department of physical chemistry
Numerical calculations of the energies of bond breaking in sulphur-containing conntctions. The
predictions are done. The results of the calculations are consistent with experiment. Revealed a
definite patterns .
Keywords:, bond dissociation energy, interaction of atoms, numerical calculations.
ENTHALPY OF FORMATION OF DIENES. NUMERICAL CALCULATIONS AND
MAIN REGULARITIES
Yu.G. Papulov, M. G. Vinogradova, A.M. Zherikhova
Tver State University
Department of physical chemistry
Numerical calculations of an enthalpy of formation of dienes are given. Predictions are made. Results
of calculations will be coordinated with experiment. Certain regularities are revealed.
Keywords: enthalpy of education, interaction of atoms, numerical calculations.
COMPUTER SIMULATION OF MORPHOLOGY
OF TRIBLOCK COPOLYMERS
T.Yu. Selina, A.S. Pavlov
Tver State University
Department of physical chemistry
By employing DPD method computer simulation of the self-organization processes in a melt of a
triblock copolymer composed of the blocks of different stiffness was performed. The various
morphologies including body-centered lamellar structures, bicontinuous network structures, cylinders
and spherical micelles were identified. The morphology of triblock copolymer melts was shown to
depend on the composition of the copolymer and the character of the interactions between the
copolymer segments.
Keywords: microphase separation, triblock copolymers, computer simulation.
STUDY OF RHEOLOGICAL PROPERTIES IN WATER SOLUTION OF L-CYSTEINE
AND SILVER NITRATE AT INTRODUCTION CERTAIN ELECTROLYTES
Y.V. Andrianova, S.D. Khizhnyak, P.M. Pakhomov
Tver State University
Department of physical chemistry
Currently, a greater interest in the study of the process of self-assembly of supramolecular
structures in solution, leading to the formation of gels. The particular interest among these objects
occupy the low-concentration gels. One of these systems is under study hydrogel based on Lcysteine and silver nitrate [1], which has a supramolecular structure. The hydrogel provides a
unique model system for the study of self-organization in a dilute aqueous solution (concentration
of 0.1% and below), secondly, the presence of silver in the system makes it possible to use in
medical practice. As a result of earlier studies, it was concluded that after mixing the components
in the solution run the processes leading to the formation of supramolecular assemblies [2].
Experimentally it has been shown [3] that the gelation process can have a strong influence certain
substances, such as acids, some electrolytes, non-electrolytes, polymers and etc. In addition, the
introduction in CSS of salts of some metals may enhance its medical properties.
Therefore, the aim of this work is to study the methods of dynamic light scattering and
viscometer maturation process (structuring) CSS and its gelation under the influence of some metal
salts (chlorides, sulfates, tungstate and molybdate).
Keywords: low-concentration aqueous solution, L-cysteine, silver nitrate, electrolytes, selforganization process, thixotropic hydrogels
COMPUTER SIMULATION OF MORPHOLOGY OF THE
THIN FILMS FORMED BY DIBLOCK COPOLYMERS
WITH THE BLOCKS OF DIFFERENT STIFFNESS
N.V. Ilina, A.S. Pavlov
Tver State University
Department of physical chemistry
Using DPD method computer simulation of the thin films consisting of a diblock copolymer
composed of the blocks of different stiffness was performed. At varying the copolymer
composition lamellae and hexagonally ordered morphologies similar to those seen in flexible
copolymer systems were observed. A transitional structuring between spherical and
cylindrical ordering was also fixed. The pair correlation functions and structure factors were
calculated for all the structures observed.
Keywords: block copolymers, microphase separation method of dissipative particle dynamics.
V.K. SEMENCHENKO (1894-1982)
(On the 120-th anniversary)
Yu.G. Papulov1, M.G. Vinogradova1, A.S. Levina2
Tver State University
Department of physical chemistry
2
Department of organic chemistry
1
In connection with 120-th anniversary of Vladimir Semenchenko, a brief outline of his
biography (including the Tver region) is presented.
Keywords:, Vladimir Semenchenko, Tver University, thermodynamics, surface- tension,
solution theory.