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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., 2009, 3, 5—13.

Synthesis, Structure and Mesomorphism of Sandwich Complexes of Rare-Earth Metals with Octa(Benzo-15-Crown-5) Substituted phthalocyanine

O. B. Akopova1, N. M. Kurochkina2, G. S. Salomatina2, I. N. Senchikhin2, M. R. Kiselev2 , V. E. Baulin2, A. Yu. Tsivadze2

Author affiliations
1Nanomaterials Research Institute, Ivanovo State University
Ermak st., 37/7, 153025 Ivanovo, Russia.
2Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences,
Leninsky Ave, 31, 119991 Moscow, Russia

Modelling, calculation of molecular parameters and the prognosis of mesomorphism of 15 new sandwich complexes of REM with octa(benzo-15-crown-5) substituted phthalocya-nine (II) is realized. The results of the prognosis revealed that compounds of the structures mentioned above could not build-up the columnar and nematic termotropic mesomorphism. The reason of mesomorphism absence is the small size of the K parameter, responsible for discoid form of such metalcomplexes (II).
With the purpose of prognosis results’ acknowledgement three metalcomplexes (M = La, Sm, Lu) were synthesized. Thermopolarizational researche of these samples II (M = La, Sm, Lu) has shown that they have no liquid crystal properties that adjusts well with the prognosis results.

Keywords: columnar mesomorphism, phthalocyanine and crown-ether derivatives, prognosis, synthesis

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