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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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Zhidk. krist. ikh prakt. ispol'z. = Liq. Cryst. and their Appl., 2017, 17 (2), 42—50.
DOI: 10.18083/LCAppl.2017.2.42





Mesomorphic, Sorption and Selective Properties of 4-(4-{4-[2-Hydroxyethyloxy]Benzoyloxy}-Phenyldiazenyl)Benzaldehyde as Stationary Phase for Gas Chromatography



G. V. Kuvshinov1, K. M. Litov2, S. A. Kuvshinova1, O. I. Koifman1,3

Author affiliations
1Ivanovo State University of Chemistry and Technology, Research Institute of Macroheterocyclic Compounds,
7 Sheremetevsky Ave., Ivanovo, 153000, Russia
2Ivanovo State Medical Academy,
8 Sheremetevsky Ave., Ivanovo, 153000, Russia
3Institute of Solutions Chemistry Russian Academy of Sciences,
1 Academicheskaya St., Ivanovo, 153045, Russia
E-mail: sofya.kuv@yandex.ru

Abstract
Mesomorphic properties of the 4-(4-{4-[2-hydroxyethyloxy]benzoyloxy}-phenyldiazenyl)benzaldehyde (HEOPhOB) have been investigated by differential scanning calorimetry. The studied HEOPhOB have revealed enantiotropic nematic mesomorphism over wide temperature range. The sorption from the gaseous phase of eight organic compounds by HEOPhOB has been studied by gas chromatography. Strong polar electron-donating isomers of methylpyridines and dimethylpyridines as well as low-polar isomers of xylenes and cresols were used as sorbates. Specific retention volume and separation parameters of the sorbates were calculated. Sorption and selective properties of the stationary phase based on HEOPhOB were analyzed. Gas chromatography studies have shown that sorbents based on HEOPhOB are highly selective towards various structural isomers; that cannot be achieved using conventional nematic liquid crystals.

Keywords: gas chromatography, mesogen, stationary phase, sorbate, specific retention volume, separation factor





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