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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., 2011, 4, 120—128.

Solvent-Induced Mesomorphism in Calamitic Complexes of Silver(I)

A. I. Smirnova1,2, D. W. Bruce1

Author affiliations
1Department of Chemistry, University of York,
Heslington, YO10 5DD, YORK, UK
2Nanomaterials Research Institute, Ivanovo State University,
153025 Ivanovo, Russia, ul. Ermaka, 37/7

Calamitic stilbazole complexes of silver(I) containing a tetradecylsulfate anion have been studied. The thermotropic behaviour of these materials shows the presence of nematic, SmC, SmA, S4 and cubic phases. On addition of solvent, three types of behaviour can be discerned: apolar solvents associate with the ligand terminal chains and promote phases with curved interfaces; small dipolar, aprotic solvents associate with the core and favour mesophases that do not possess curved interfaces, while short-chain alcohols hydrogen bond with the ionic core of the complexes to form ribbon-like structures that organise into chro-monic phases. This solvent-induced behaviour is compared with the solvent-induced behav-iour of analogous polycatenar complexes of silver(I) and with more conventional, calamitic organic compounds with hydroxy-terminated chains.

Keywords: calamitic mesogens, metallomesogens, solvent-induced mesomorphism, silver

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