Exhibition of Induced Mesophases in the Binary Systems where One or Both the Components are Non-Mesogenic

A number of binary systems with induced smectic and/or nematic mesophases where one or both the components are mesogenic, have been reported by us.1,2 To quantify the results, eight more binary systems of the types were studied. In the three binary systems of both non-mesogenic components, induced nematic and smectic mesophages are observed in number of compositions. In the binary system where one of the components is monotropic nematic, an induced smectic phase is observed and the monotropic nematic phase is converted to an enantiotropic phase. The remaining binary systems where one component exhibits a monotropic smectic mesophase, an enantiotropic smectic mesophase is observed at comparatively lower temperatures. The terminal nitro substituent is responsible for the induced mesomorphic behaviour in the binary systems of present investigation. The phase diagrams of the present study are discussed in detail and the common features emerging from the overall study are outlined to envisage such properties in the other systems.