Isoflavone-based trimer liquid crystals: synthesis, characterization, thermal and mesomorphic properties evaluations

Abstract

A new homologous series of mesogens with isoflavone heterocycle have been synthesized and characterized. The symmetric molecular structure consists of middle ethylene/phenylenediamine and peripheral isoflavone and biphenyl cores as trimer fragments. Chemical structures were evaluated using IR, NMR and CHN techniques. Thermal, mesophase behaviours and textural types are studied by DSC and POM instrumentations. Most of the compounds are favouring liquid crystalline behaviors with Smectic and nematic mesophases.