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Liquid Crystals and their Application
Russian Journal

Zhidkie kristally i ikh prakticheskoe ispol'zovanie

Жидкие кристаллы и их практическое использование

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Rus Eng


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Zhidk. krist. ikh prakt. ispol'z. = Liq. Cryst. and their Appl., 2018, 18 (2), 86—94.
DOI: 10.18083/LCAppl.2018.2.86

Influence of (2R,3R)-(-)2,3-Butanediol on Mesomorhic and Optical Properties of Liquid Crystalline Mixtures on the Base of 4-Alkyloxy-4'-Cyanobiphenyls

I. V. Novikov, V. V. Aleksandriiskii , L. O. Monakhov, V. A. Burmistrov

Author affiliations
Ivanovo State University of Chemistry and Technology,
Research Institute of Macroheterocyclic Compounds,
7 Sheremetevsky Ave., Ivanovo, 153000, Russia

Mesomorhic and optical properties of the (2R,3R)-(-)2,3-butanediol solutions in liquid-crystalline mixtures on the base of 4-alkyloxy-4'-cyanobiphenyls (CB-6) were studied. The formation of a chiral nematic phase with the addition of (2R, 3R)-(-)2,3-butanediol was shown by polarization microscopy. The dopants destabilizing effect on the mesophase thermal stability was evaluated based on the mixtures clearance temperature. The pitch of the induced chiral mesophase is measured. The refractive indices and birefringence of liquid-crystal mixtures were measured by refractometric method. The birefringence was shown to decrease at the increase in dopants concentration.

Keywords: liquid crystals, chirality, dopants, birefringence, order parameters, dielectric properties, hydrogen bond, dipole-dipole association

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