Thermodynamic properties and selectivity of substituted liquid-crystal formylazobenzenes as stationary phases for gas chromatography

Abstract

The retention of xylene, cresol, methylanisole, and lutidine isomers was studied by gas chromatography using the stationary phases based on mesomorphic 4-butyloxy-4′-formylazobenzene and 4-(3-hydroxypropyloxy)-4′-formylazobenzene. A thermodynamic interpretation of the structural selectivity of the nematic phase of the mesogens was proposed.