Design and synthesis of hydrogen bonded binary mixture liquid crystals

An intermolecular hydrogen bond is formed between 4-undecyloxy benzoic acid (11BAO) and cholesteryl acetate (CHA) which has been confirmed by Fourier transform infrared (FTIR) spectroscopic studies. Phase transition temperatures and enthalpy values are experimentally evaluated by polarizing optical...

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Bibliographic Details
Published in:Ferroelectrics 2016-09, Vol.502 (1), p.119-129
Main Authors: Mahalingam, T, Venkatachalam, T, Jayaprakasam, R, Vijayakumar, V N
Format: Article
Language:English
Subjects:
binary mixture
Binary mixtures
Bonding
Calorimetry
clearing point
Crystals
DSC
Enthalpy
Ferroelectrics
Fourier transforms
Hydrogen
Hydrogen bonded liquid crystals
Infrared spectroscopy
Liquid crystals
nematic
Phase transitions
smectic
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Summary:An intermolecular hydrogen bond is formed between 4-undecyloxy benzoic acid (11BAO) and cholesteryl acetate (CHA) which has been confirmed by Fourier transform infrared (FTIR) spectroscopic studies. Phase transition temperatures and enthalpy values are experimentally evaluated by polarizing optical microscopic (POM) and differential scanning calorimetric (DSC) studies. An interesting feature in this paper is that the observation of wider thermal span of the mesogenic phases and decreased enthalpy values of all phases in the binary mixture compared to the individual mesogen. The resultant hydrogen bonded liquid crystal mixture complexes possess a Nematic phase with a high clearing point, and a low melting point compared to constituent in the complex.
ISSN:0015-0193
1563-5112
DOI:10.1080/00150193.2016.1234913