Sorbtion and selective properties of supramolecular liquid crystal–β-cyclodextrin sorbent under conditions of gas chromatography

Sorbtion and selective properties of binary sorbent based on polar supramolecular (associated) liquid crystal (LC) 4-(3-hydroxypropyloxy)-4'-formylazobenzene (HPOFAB) and unsubstituted β-cyclodextrin are studied by the method of inverse gas chromatography. Standard thermodynamic functions of sorbtion in smectic phase A of the sorbent are determined for 21 organic compounds belonging to different classes of hydrocarbons and alcohols, which are compared to analogous functions obtained using a column with HPOFAB. The causes of decrease of retention of all studied compounds (excluding n-alkanes C9–C12) upon introduction of β-cyclodextrin into HPOFAB are discussed. It is established that mixed S A phase of the binary sorbent possess high values of para-meta-selectivity and enantioselectivity with respect to optical isomers of camphene.