Exhibition of Non-Linear Behaviour and Smectic and Nematic Mesophases in the Binary Systems Where Both the Components are Non-Mesogenic

Abstract

Binary systems of two non-mesogens exhibiting polymesomorphism are rare. In the present study three binary systems of non-mesogens exhibiting smectic and/or nematic mesophases are reported. One of the component is Schiff base and possesses strongly polar nitro end group. The transition temperature curves exhibit non-linear behaviour. In another binary system where one of the component exhibit monotropic nematic phase, induced smectic mesophase is observed and the monotropic nematic phase is converted to enantiotropic phase in certain concentration range. The binary systems of non-mesogens having identical structures (homologues) do not exhibit mesomorphism. Binary systems, where both the components are homologues and one of them is monotropic nematic, then, ideal behaviour is observed in their mixed mesomorphism.