Synthesis and characterization of new pyridine-based chiral calamitic liquid crystals


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Vardar D., OCAK H. , Akdaş Kılıç H. , Jeannin O., Camerel F., Eran B. B.

Liquid Crystals, vol.48, no.6, pp.850-861, 2021 (Journal Indexed in SCI Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 48 Issue: 6
  • Publication Date: 2021
  • Doi Number: 10.1080/02678292.2020.1825841
  • Journal Name: Liquid Crystals
  • Journal Indexes: Science Citation Index Expanded, Scopus, Academic Search Premier, Aerospace Database, Chemical Abstracts Core, Chimica, Communication Abstracts, INSPEC, Metadex, Civil Engineering Abstracts
  • Page Numbers: pp.850-861
  • Keywords: Liquid crystal, pyridine, calamitic compounds, nicotinate, picolinate, chiral chain, BEHAVIOR, SERIES

Abstract

© 2020 Informa UK Limited, trading as Taylor & Francis Group.In this paper, novel chiral calamitic compounds, consisting of n-dodecyloxyphenyl substituted pyridine carboxylate core linked to one or two benzene rings through ester linkers have been synthesised by multi-step procedures. The other end has been varied by introducing a flexible (S)-2-methylbutyloxy or (S)-3,7-dimethyloctyloxy chiral chain. The liquid crystal properties of new compounds were investigated by various experimental techniques such as DSC, POM and SAXS. The pyridine-based calamitic compounds exhibited enantiotropic chiral smectic mesophases such as SmC*, SmA or uncharacteristic mesophase depending on hetero aromatic rings such as nicotinate or picolinate cores, number of aromatic rings and the type of chiral-branched chain.