Influence of hydrogen bonding on phase abundance in ferroelectric liquid crystals

B. Sridevi, P. V. Chalapathi, M. Srinivasulu, V. G.K.M. Pisipati, D. M. Potukuchi

Research output: Contribution to journalArticlepeer-review

41 Citations (Scopus)

Abstract

The synthesis and characterization of five hydrogen-bonded ferroelectric liquid crystal complexes (HBFLCs) prepared from mesogenic p-n-alkoxy benzoic acids and non-mesogenic propionic/butyric acids with different chiral centres are reported. Complementary intermolecular hydrogen bonding is confirmed through IR study. HBFLCs are found to exhibit chiral nematic (N*), smectic C* (SmC*) and smectic G* (monotropic) phases in their cooling profiles during polarizing thermal microscopy and differential scanning calorimetry. Phase coexistence regions are observed above the IN* transition. The chiral nematic to smectic C* transition is found to be of first order. The temperature variation of spontaneous polarization exhibited by these HBFLC complexes in their SmC* phase is presented. The effect of non-covalent interaction imparted by the soft hydrogen bonding in these LC complexes on enhanced or induced thermal stability of tilted LC phases is discussed.

Original languageEnglish
Pages (from-to)303-310
Number of pages8
JournalLiquid Crystals
Volume31
Issue number3
DOIs
Publication statusPublished - 01-03-2004

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

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