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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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Zhidk. krist. ikh prakt. ispol'z. = Liq. Cryst. and their Appl., 2009, 3, 5—13. |
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Synthesis, Structure and Mesomorphism of Sandwich Complexes of Rare-Earth Metals with Octa(Benzo-15-Crown-5) Substituted phthalocyanine
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O. B. Akopova1, N. M. Kurochkina2, G. S. Salomatina2, I. N. Senchikhin2,
M. R. Kiselev2 , V. E. Baulin2, A. Yu. Tsivadze2
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Author affiliations
1Nanomaterials Research Institute, Ivanovo State University
Ermak st., 37/7, 153025 Ivanovo, Russia.
E-mail: akopov@dsn.ru
2Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences,
Leninsky Ave, 31, 119991 Moscow, Russia
E-mail: nad_log@mail.ru
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Abstract
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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