Molecular Theory on Dimeric Liquid Crystals

Abstract

We study molecular theoretically the nematic phase of dimeric molecules composed of two rod like mesogens and hydrocarbon spacer; especially focussing our attention on the role of spacer in the nematic-isotropic phase transition. The experimental finding s that the transition temperature Tc decreases but the transition entropy Δ Σc increases with the length of spacer can be explained qualitatively.