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S. A. Syrbu¹, O. Yu. Ditsyna¹, М. R. Kiselev²

Author affiliations
¹Inorganic and Analytical Chemistry Department, Ivanovo State University,
39 Ermak St., Ivanovo, 153025, Russia
E-mail: syrbue@yandex.ru
¹Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences,
31 Leninsky Pr., Moscow, 119991, Russia
E-mail: kisselev@physhe.ac.ru

Abstract
Mesomorphic properties of p-n-propyloxybenzoic acid – p-n-propyloxy-p'-cyanobiphenyl system were studied by polarizing thermomicroscopy and differential scanning calorimetry. Bulk properties of the system were investigated by polythermal dilatometry method. Analysis of temperature and concentration dependencies of bulk properties was performed. Formation of chained supramolecular associates between p-n-propyloxybenzoic acid and p-n-propyloxy-p'-cyanobiphenyl due to hydrogen bonding was established. Dielectric properties of the system were investigated by the dielcometry method. Two subphases were found in the region of nematic phase existence. These subphases possess different mesomorphic and physical properties

Keywords: liquid crystals, mesomorphic properties, bulk properties, dielectric properties, polarizing thermomicroscopy, differential scanning calorimetry, polythermal dilatometry, dielcometry, phase diagram, nematic subphases, chained associates, supramolecular structure, hydrogen bond, Н-complex