Features of intermolecular interactions in binary solutions of nematic p-alkanoyloxy-p '-nitroazoxybenzenes with aliphatic alcohols: I. Thermodynamics of solution of alcohols in mesomorphic structures of mesogens

The thermodynamics of solution of normal C-3-C-5 alcohols in nematic struct ures of p-alkanoyloxy-p'-nitroazoxybenzenes (R = C3H7, C5H11, C7H15) was st udied by gas-liquid chromatography. An increase in the size of the alkyl su bstituent in the mesogen leads to strengthening of mesogen-nonmesogen H bon ds and increase in the role of the conformational factor in the intermolecu lar interaction energy. The revealed trends in variation of the thermodynam ic parameters of solution of alcohols in nematic structures are associated with changes in the relative contributions of specific and nonspecific inte ractions in these solutions.