Chiral polymorphism in new imine based rod-like liquid crystals

Çağlar F. P. , Akdaş-Kılıç H. , Ocak H. , Eran B. B.

Journal of Molecular Structure, vol.1220, 2020 (Journal Indexed in SCI Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 1220
  • Publication Date: 2020
  • Doi Number: 10.1016/j.molstruc.2020.128755
  • Title of Journal : Journal of Molecular Structure
  • Keywords: Imine, Rod-like liquid crystals, Chiral mesophases, Polymorphism, BLUE PHASES, CROSS-OVER, COMPLEXES, PALLADIUM(II), POLARIZATION, MOLECULES, LIGANDS, SOFT

Abstract

© 2020 Elsevier B.V.New imine based rod-like compounds, composed of three-benzene-ring molecular core linked with azomethine as well as ester groups and terminated with (S)-3,7-dimethyloctyloxy chiral unit at one side have been synthesized. The other terminal position has been varied by using n-octyloxy/decyloxy/dodecyloxy groups to reveal chain length effect on mesophase behavior. The liquid crystalline properties of the new compounds have been investigated by polarizing optical microscopy, differential scanning calorimetry and electro-optic studies. The novel chiral calamitics derived from Schiff base or salicylaldimine-core show a chiral polymorphism comprising of blue phase and chiral nematic as well as smectics such as chiral tilted smectic and unidentified smectic mesophase.