Thermotropic liquid crystalline phases in binary mixture of nonmesogenic compounds

Govindaiah, T. N. and Sreepad, H. R. and Nagappa (2012) Thermotropic liquid crystalline phases in binary mixture of nonmesogenic compounds. Molecular Crystals and Liquid Crystals, 557 (1). pp. 11-17. ISSN 1563-5287

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The binary mixture of two nonmesogenic compounds viz., Tetradecyl Trimethyl Ammonium Bromide (TTAB) and Orthophosphoric acid (H3PO4) exhibits very interesting liquid crystalline smectic phases at large range of concentrations and temperature. The mixture with lower and higher concentrations of TTAB exhibits Sm A, Sm D, Sm B, and Sm E phases, sequentially when the specimen is cooled from its isotropic phase. Different liquid crystalline phases observed in the mixture were studied using DSC, X-ray, and Optical microscopic techniques. The temperature variation of optical anisotropy has also been discussed. Helfrich potential and elastic moduli have been estimated in the smectic phase using Helfrich model.

Item Type: Article
Subjects: D Physical Science > Physics
Divisions: Department of > Physics
Depositing User: MUL SWAPNA user
Date Deposited: 26 Jul 2019 09:55
Last Modified: 26 Jul 2019 09:55

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