Relative permittivity of a few H-bonded liquid crystals

Mónika Valiskó, János Liszi, István Szalai

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

This paper presents the experimentally determined relative permittivities of a few 4-n-alkoxybenzoic acids and their binary mixtures with 4,4′-bipyridine. Selective recognition between a benzoic acid derivative and a nonmesogenic molecule through H-bond results in liquid crystalline properties. Due to the formed intermolecular hydrogen bonding, the liquid crystal behaviour becomes stronger. The measured relative permittivities are higher for mixtures than in the case of pure alkoxybenzoic acids. Because of the H-bonding, the dielectric anisotropy becomes negative and its absolute value is larger compared to the pure 4-n-alkoxybenzoic acids, where the anisotropy is positive and lower.

Original languageEnglish
Pages (from-to)39-43
Number of pages5
JournalJournal of Molecular Liquids
Volume109
Issue number1
DOIs
Publication statusPublished - Jan 15 2004

Keywords

  • Hydrogen bond
  • Liquid crystal
  • Relative permittivity

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics
  • Spectroscopy
  • Physical and Theoretical Chemistry
  • Materials Chemistry

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