Synthesis, Spectral and Mesomorphic Properties of Nematic 4-Ethyloxy-4'-(ω-Hydroxyalkyloxy)azo- and Azoxybenzenes

Liquid Crystals and their Application
Russian Journal

Zhidkie kristally i ikh prakticheskoe ispol'zovanie

Жидкие кристаллы и их практическое использование

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Zhidk. krist. ikh prakt. ispol'z. = Liq. Cryst. and their Appl., 2009, 2, 45—51.

Synthesis, Spectral and Mesomorphic Properties of Nematic 4-Ethyloxy-4'-(ω-Hydroxyalkyloxy)azo- and Azoxybenzenes

S. A. Kuvshinova¹, K. M. Litov¹, I. V. Novikov¹, V. V. Alexandrijsky^1,2, V. A. Burmistrov^1,2

Author affiliations
¹Ivanovo State University of Chemistry and Technology, Department of Higher Molecular Compounds Technology
Russia 153460 Ivanovo, Av. F. Engel’s, 7.
E-mail: burmistrov@isuct.ru
²Institute of Solution Chemistry, RAS.
Russia 153045 Ivanovo, Akademicheskaya Str., 1.

Abstract
Optimum conditions of synthesis of 4-ethyloxy-4'-(ω-hydroxyalkyloxy)azobenzenes and 4-ethyloxy-4'-(ω-hydroxyalkyloxy)azoxybenzenes homologues were developed (С₃, С₆, С₈, С₉). Their structural characterization was carried out by the methods of element analysis and IR and ¹H nuclear magnetic resonance spectroscopy. Mesomorphic properties of the synthesized compounds were studied by polarizating thermomicroscopy and differential scanning calorimetry. The influence of the bridge groups and therminal substitutions on their meso-morphic properties was analyzed.

Keywords: synthesis, structural characterization, mesomorphic properties, nematic liquid crystals, polarizing thermomicroscopy, differential scanning calorimetry

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