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

Authors: NİHAT AKKURT, MOHAMMED HADI ALI AL-JUMAILI, HALE OCAK, FATİH ÇAKAR, LOKMAN TORUN

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

Keywords: Triazine, ionic liquid crystals, hydrogen bonding, star-shaped triazine, Sonogashira coupling

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