Biphenyl Based Non-symmetrical Bent-Core Mesogens Containing a Chiral Moiety and an Olefinic End Group

Ocak H., Bilgin-Eran B.

MOLECULAR CRYSTALS AND LIQUID CRYSTALS, vol.609, pp.19-30, 2015 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 609
  • Publication Date: 2015
  • Doi Number: 10.1080/15421406.2014.953746
  • Journal Name: MOLECULAR CRYSTALS AND LIQUID CRYSTALS
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.19-30
  • Keywords: chiral moiety, olefinic end group, liquid crystals, rod-like wings, Bent-core mesogens, LIQUID-CRYSTALLINE PHASES, CROSS-COUPLING REACTIONS, MESOMORPHIC PROPERTIES, ACHIRAL MOLECULES, POLAR ORDER, MESOPHASE, BEHAVIOR, SYSTEMS, CHAINS, ACIDS
  • Yıldız Technical University Affiliated: Yes

Abstract

New nonsymmetrical bent-core compounds consisting of a biphenyl-3,4 '-diol central unit, a chiral terminal chain and an olefinic end group at the other terminus have been synthesized and characterized to study the influence of a chiral moiety, the length of terminal alkenyl chain, and the number of aromatic rings in the rod-like wings which are substituted at the 3- and 4-position of central biphenyl core on mesophase properties of bent-core mesogens. The liquid crystalline properties of the compounds were investigated by differential scanning calorimetry, optical polarizing microscopy, and electro-optic methods. Depending on the length of the olefinic chain and the number of aromatic rings in the rod-like wings, the bent-core compounds with a chiral moiety show B-1 type mesophase, polar smectic C phase (SmCP) or nonmesomorphic behavior.