Isomer-Selective Properties of Carbon Adsorbent Modified by "4-n-octyloxy-4'-cyanobiphenyl – β-Cyclodextrin" under Gas-Adsorption Chromatography Conditions

Abstract
The isomer-selective properties of the carbon adsorbent Carbopack Y modified by successively applied immiscible monolayers of 4-n-octyloxy-4'-cyanobiphenyl mesogen and β-cyclodextrin have been studied. It has been shown that the bilayer modified adsorbent has a high selectivity to structural and optical isomers under the conditions of the gas-adsorption chromatography. Thermodynamic justification of the selectivity and its temperature dependence has been given. Compensation temperatures for the reversal of the isomer conversion from the chromatographic column have been calculated.

Keywords: adsorption, carbon adsorbents, modification, liquid crystal, cyclodextrin, bylayer, isomers, structure, optical properties, selectivity, gas-adsorption chromatography