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

Authors : Nihat Akkurt, Mohammed Hadı Alı Al-jumaili, Hale Ocak, Fatih Çakar, Lokman Torun

Pages : 726-735

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Publication Date : 9999-12-31

Article Type : Makaleler

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