The synthesis and dielectric properties of a new phenylbenzoate-based calamitic liquid crystal

Ahlatcıoğlu Özerol E., OCAK H., BİLGİN ERAN B., Karavelioğlu S.

Journal of the Iranian Chemical Society, vol.18, no.1, pp.225-232, 2021 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 18 Issue: 1
  • Publication Date: 2021
  • Doi Number: 10.1007/s13738-020-02021-x
  • Journal Name: Journal of the Iranian Chemical Society
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier
  • Page Numbers: pp.225-232
  • Keywords: Calamitic liquid crystal, (S)-3, 7-Dimethyloctyloxychiral unit, Smectic phase, Dielectric properties, BENZOATE DERIVATIVES, CHAIN-LENGTH, BEHAVIOR, TEMPERATURE, ABSORPTION, PARAMETERS, COMPLEXES, MESOGENS, DIMERS
  • Yıldız Technical University Affiliated: Yes


© 2020, Iranian Chemical Society.The dielectric investigation has a great importance in liquid crystal studies as a supportive method to DSC for a complete characterization of liquid crystals as well as in the electronic applications. In this study, the synthesis, mesomorphic characterization and dielectric properties of a new phenylbenzoate-based three-ring calamitic liquid crystal which composed of ester linking groups, (S)-3,7-dimethyloctyloxy chiral unit at one of terminals and n-octyloxy chain at the other end of the molecule, have been reported. The new calamitic liquid crystal 4-[4-((S)-3,7-dimethyloctyloxy)phenoxy)carbonyl]phenyl 4-(n-octyloxy)benzoate (DPCPB) has been characterized using 1H, 13C-NMR and MS-QTOF. The liquid crystalline behavior of the target compound has been investigated by differential scanning calorimetry and optical polarizing microscopy. DPCPB exhibits an enantiotropic non-tilted smectic mesophase in a wide temperature range. The real and imaginary dielectric constant, conductivity mechanism, impedance and dielectric relaxation mechanism of DPCPB have been investigated depending on frequency at different temperatures.