Synthesis and Characterization of Liquid Crystalline Property of a New Thermotropic Liquid rystalline Molecules with Terminal End Group and DSC Study

Abstract

We synthesized and studied a novel homologous series of esters with a lateral methoxy group and a terminal nheptyl benzoate group to study how mesomorphic behavior correlates with structure. The twelve-membered series comprises non-mesomorphic methoxy to heptyloxy derivatives, while the remaining homologs are smectegenically mesomorphic without expressing any nematic characteristics. On a heating-stage-equipped optical polarizing microscope, we observed transition temperatures and textures. IR, 1H NMR, mass spectra, and elemental analysis characterized some representative members. Analytical data confirm the molecular structures of the homologs. The mesomorphic characteristics of the current novel series are compared with those of recognized structurally comparable series. The average thermal stability of the current series is 72 °C.