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Issue 80, 2015
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Azo-containing asymmetric bent-core liquid crystals with modulated smectic phases

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Abstract

A new series of azo-containing bent-core liquid crystals derived from 3-hydroxybenzoic acid has been synthesized. Their mesomorphic properties have been characterized by polarizing optical microscopy, differential scanning calorimetry, small-angle X-ray diffraction and electro-optic studies. Almost all the compounds form an enantiotropic modulated smectic (B7 type) phase over relatively broad temperature ranges. Structural modifications, such as the type and length of the terminal chains, the rigidity of wings, and the presence of a Cl-substituent in different positions of the bent core, affect the appearance and temperature range, but not the type of the mesophase of the investigated compounds. Light-induced changes in the texture and phase transition of the mesophase, attributed to the decrease of the order parameter due to transcis isomerization, have also been observed.

Graphical abstract: Azo-containing asymmetric bent-core liquid crystals with modulated smectic phases

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Publication details

The article was received on 24 May 2015, accepted on 20 Jul 2015 and first published on 21 Jul 2015


Article type: Paper
DOI: 10.1039/C5RA09764A
Citation: RSC Adv., 2015,5, 64886-64891
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    Azo-containing asymmetric bent-core liquid crystals with modulated smectic phases

    N. Trišović, J. Antanasijević, T. Tóth-Katona, M. Kohout, M. Salamonczyk, S. Sprunt, A. Jákli and K. Fodor-Csorba, RSC Adv., 2015, 5, 64886
    DOI: 10.1039/C5RA09764A

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