Influence of Hydrogen bonding on Phase abundance in Ferroelectric Liquid crystals

Sridevi, B and Chalapathi , A V and Srinivasulu, M and Pisipati, V G K M and Potukuchi, D M (2004) Influence of Hydrogen bonding on Phase abundance in Ferroelectric Liquid crystals. Liquid Crystals, 31 (3). pp. 303-310. ISSN 1366-5855

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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.

Item Type: Article
Additional Information: # 2004 Taylor & Francis Ltd
Subjects: Engineering > MIT Manipal > Chemistry
Depositing User: MIT Library
Date Deposited: 09 Feb 2013 07:45
Last Modified: 09 Feb 2013 07:45

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