Eugene Vashchenko - Academia.edu (original) (raw)
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National Research University of Information Technologies, Mechanics and Optics
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Papers by Eugene Vashchenko
Molecular Crystals and Liquid Crystals, 2009
We have synthesized and investigated a new chiral dopant. It belongs to the derivatives of p-terp... more We have synthesized and investigated a new chiral dopant. It belongs to the derivatives of p-terphenyldicarboxylic acid and has twisting power in the smectic C* mixture much higher than any chiral compound of this series known before. The ferroelectric liquid crystal mixtures on the base of achiral SmC matrix and the new chiral dopant have been elaborated and there optical and electro-optical properties were investigated.
Russian Chemical Bulletin, 2001
A new model for equilibrium adsorption of a binary mixture on zeolites that takes into account th... more A new model for equilibrium adsorption of a binary mixture on zeolites that takes into account the energy nonuniformity of the adsorption field in the zeolite cavities was developed on the basis of statistical thermodynamics. The nonuniformity of the adsorption field produces rearrangement of molecules in the cavity volume, decreasing the entropy, internal energy, and Helmholz free energy. A procedure for calculation of the thermodynamic functions from the data on the adsorption of pure components was proposed. The limiting cases of maximum ordering of the molecules in the cavity and their random distribution were considered. The approach proposed was exemplified by the substantially non-ideal system nitrogen--argon--zeolite NaX at 160 K. The proposed model describes the behavior of this mixture much better than that of the ideal adsorbed solution theory.
Molecular Crystals and Liquid Crystals, 2009
Two new light scattering modes have been discovered in short helix pitch (p0 350 nm) ferroelectr... more Two new light scattering modes have been discovered in short helix pitch (p0 350 nm) ferroelectric liquid crystal (FLC). One of the modes arises because of a special kind of the FLC structure non-uniformity that originates inherently as a new phenomenon if the helix pitch is very small. Another mode relates to the helix twisting after the driving voltage switching off.
Molecular Crystals and Liquid Crystals, 2009
We have synthesized and investigated a new chiral dopant. It belongs to the derivatives of p-terp... more We have synthesized and investigated a new chiral dopant. It belongs to the derivatives of p-terphenyldicarboxylic acid and has twisting power in the smectic C* mixture much higher than any chiral compound of this series known before. The ferroelectric liquid crystal mixtures on the base of achiral SmC matrix and the new chiral dopant have been elaborated and there optical and electro-optical properties were investigated.
Russian Chemical Bulletin, 2001
A new model for equilibrium adsorption of a binary mixture on zeolites that takes into account th... more A new model for equilibrium adsorption of a binary mixture on zeolites that takes into account the energy nonuniformity of the adsorption field in the zeolite cavities was developed on the basis of statistical thermodynamics. The nonuniformity of the adsorption field produces rearrangement of molecules in the cavity volume, decreasing the entropy, internal energy, and Helmholz free energy. A procedure for calculation of the thermodynamic functions from the data on the adsorption of pure components was proposed. The limiting cases of maximum ordering of the molecules in the cavity and their random distribution were considered. The approach proposed was exemplified by the substantially non-ideal system nitrogen--argon--zeolite NaX at 160 K. The proposed model describes the behavior of this mixture much better than that of the ideal adsorbed solution theory.
Molecular Crystals and Liquid Crystals, 2009
Two new light scattering modes have been discovered in short helix pitch (p0 350 nm) ferroelectr... more Two new light scattering modes have been discovered in short helix pitch (p0 350 nm) ferroelectric liquid crystal (FLC). One of the modes arises because of a special kind of the FLC structure non-uniformity that originates inherently as a new phenomenon if the helix pitch is very small. Another mode relates to the helix twisting after the driving voltage switching off.