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Liquid Crystals and their Application
Russian Journal

Zhidkie kristally i ikh prakticheskoe ispol'zovanie

Жидкие кристаллы и их практическое использование

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Rus Eng


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Zhidk. krist. ikh prakt. ispol'z. = Liq. Cryst. and their Appl., 2012, 3, 58—67.

Sorption and Selective Properties of Composite Sorbents Based on the Eutectic Mixture of Nematic Liquid Crystals and Methylated β-Cyclodextrin

L. A. Onuchak, T. S. Burmatnova, R. Ph. Stepanova, Yu. G. Kuraeva, E. S. Tyurina

Author affiliations
Samara State University, Department of physical chemistry and chromatography
443011 Samara, Akademik Pavlov str., 1. Russian Federation

Mesomorphic, sorption and selective properties of the three-component sorbent based on the eutectic mixture of achiral liquid crystals 4-methoxy-4'-ethoxybenzene and 4,4'-diethoxyazoxybenzene and chiral macrocyclic heptakis(2,3,6-tri-O-methyl)-β-cyclodextrin were studied. It was established that macrocyclic additive induces formation of spirally twisted chiral nematic phase. Thermodynamic functions of sorption from the gas phase for 28 organic compounds (n-alkanes, cycloalkanes, arenes, monoatomic alcohols, heterocyclic compounds, optical isomers, camphene, pinene, butanediol-2, and 3) were determined. The reasons of manifestation of isomer-selective sorbent properties with respect to structural, cis-trans- and optical isomers in gas chromatography were discussed.

Keywords: liquid crystal, chiral macrocycle, composite sorbents, gas chromatography, selectivity, enantioselectivity

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