3B05 Effects of axial chirality on physical properties in liquid-crystalline phases

Abstract

We have prepared binaphtyl derivatives containing the rigid rod-like substituents and investigated effects of axial chirality on transition behaviour and twisting powers in the liquid-crystalline phases. The binaphtyl derivatives were found to induce shorter pitches in the Ch phases than in the smectic C* phases. Melting temperature for the optical isomer of binaphtyl compound was considerably lower than that for the racemic mixture, suggesting that the molecules prefer to pack in a crystal structure with molecules of opposite chirality rather than the same.