Synthesis and liquid crystalline properties of new triazine-based π-conjugated macromolecules with chiral side groups

Abstract

In this study, we reported the synthesis of a new tribranched macromolecule liquid crystal with triazine in thecentre. The central triazine core is bonded via sequences of Sonigashira coupling to 3 triazine unites through acetylenicbridges. The triazines at the periphery are substituted with 2 chiral citronellyloxy side groups. The salt of the resultingstar-shaped macromolecule, which was oily at room temperature, with 4-dodecyloxybenzoic acid at 1:1 ratio exhibited aSmectic C (SmC) mesophase. The liquid crystalline properties of organic salt were investigated using DSC (differentialscanning calorimetry) and POM (polarizing optical microscopy).