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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., 2012, 4, 62—70.

Synthesis and Mesomorphism of Sulfonic Acids of Tetrakis-4-(1-Benzotriazolyl)Tetrakis-5-[1(2)-Naphtoxy]Phthalocyanines

S. A. Znoiko1, A. V. Krivova1, G. P. Shaposhnikov1, G. A. Anan’eva2, N. V. Usol’tseva2

Author affiliations
1Ivanovo State University of Chemistry and Technology, Institute of Macroheterocycles
153460 Ivanovo, Av. Sheremetev, 7. 
2Ivanovo State University, Nanomaterials Research Institute
153025 Ivanovo, Ermak Str., 39. 

Sulfochlorides of benzotriazolylsubstituted phthalocyanines were synthesized by the interaction between tetrakis-4-(1-benzotriazolyl)tetrakis-5-[1(2)-naphthoxy]phthalocyanines and mixture of thionyl-chloride and chlorsulfonic acid. Then sulfochlorides were hydrolyzed by water up to corresponding sulfonic acids. Their solubility in aqueous media is a due to presence of sulfo-groups in naphthoxy-substituents of benzotriazolylsubstituted phthalocyanines. Research of electronic absorption spectra showed the influence of the nature of central metal on place of Q-band in UV-Vis spectra of the synthesized phthalocyanines. Bathochromic shift of Q-band of the studied phthalocyanines in the order: Ni < Cu < Zn < AlCl was observed. It was found that tetrakis-4-(1-benzotriazolyl)tetrakis-5-(1',6'-disulfo-2'-naphthoxy)phthalocyanine of copper possesses amphotropic mesomorphism.

Keywords: synthesis, sulfonic acids, benzotriazolylsubstituted phthalocyanines, mesomorphism

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