Spectroscopy investigations of phase transitions in liquid crystals

Valerii E. Pogorelov; Igor P. Pinkevich; Iryna Estrela-Llopis; Vyacheslav Bukalo

doi:10.1117/12.323686

23 September 1998 Spectroscopy investigations of phase transitions in liquid crystals

Valerii E. Pogorelov, Igor P. Pinkevich, Iryna Estrela-Llopis, Vyacheslav Bukalo

Proceedings Volume 3488, Nonlinear Optics of Liquid and Photorefractive Crystals II; (1998) https://doi.org/10.1117/12.323686
Event: International Conference on Nonlinear Optics of Liquid and Photorefractive Crystals, 1997, Partenit, Crimea, Ukraine

Abstract

The results of study of nonoriented nematic MBBA structural genesis at different temperature pre-history are reported. The temperature depended transformations of vibrational Raman spectra and their connections with the change of MBBA structure were investigated. Spectral region was 1100-1600 cm^-1, temperature interval was from 163 K to 333 K. The method allows to prognosticate structural evolution of MBBA and to identify phase states. In particular it is discovered that in dependence on cooling rate several coexisting fractions may be obtained at region lower than glass transition temperature.

Citation Download Citation

Valerii E. Pogorelov, Igor P. Pinkevich, Iryna Estrela-Llopis, and Vyacheslav Bukalo "Spectroscopy investigations of phase transitions in liquid crystals", Proc. SPIE 3488, Nonlinear Optics of Liquid and Photorefractive Crystals II, (23 September 1998); https://doi.org/10.1117/12.323686

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