Influence of Rigid Core Structure on the Ability to Induce the Smectic A_d Phase in Polar Systems

Abstract

The binary mixtures of polar compounds where one component is 4-cyanobiphenyl-4′-yI 4′-heptylbiphenyl-4-carboxylate (7CBB) and another one is a cyano derivative with the same alkyl chain length and different core structure were tested. Their phase diagrams obtained by thermomicroscopy are presented. The induced & phase appears in all presented mixtures. Molecules with short cores and with low lateral interactions cause the strongest induction of the A_d phase.