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

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Akkurt N., Al-Jumaili M. H. A., Ocak H., Çakar F., Torun L.

TURKISH JOURNAL OF CHEMISTRY, vol.44, pp.726-746, 2020 (SCI-Expanded) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 44
  • Publication Date: 2020
  • Doi Number: 10.3906/kim-1912-51
  • Journal Name: TURKISH JOURNAL OF CHEMISTRY
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Chemical Abstracts Core, TR DİZİN (ULAKBİM)
  • Page Numbers: pp.726-746
  • Keywords: Triazine, ionic liquid crystals, hydrogen bonding, star-shaped triazine, Sonogashira coupling, G PHASE, MOLECULES, MESOGENS, SERIES
  • Yıldız Technical University Affiliated: Yes

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).