Our Facebook account

V. V. Aleksandriysky^1,2, E. V. Bobritskaya^1,2, V. A. Burmistrov^1,2, O. I. Koifman^1,2

Author affiliations
¹Ivanovo State University of Chemistry and Technology, Institute of Macroheterocycles
153000 Ivanovo, Av. F. Engel’s, 7. 
E-mail: nmr@isuct.ru
²G.A. Krestov Institute of Solution Chemistry RAS
Ivanovo, 153045 Russia Akademicheskaya St., 1.

Abstract
The ¹³C NMR spectra of LC mixtures based on nematic 4-pentyloxy-4'-cyanobiphenyl containing non-mesomorphic compounds (4-aminobenzonitrile, imidazole, 2-methyl-imidazole) were obtained. It was shown that the addition of non-mesogens resulted in the change of the ¹³C chemical shifts of nitrile group of LC, indicating the formation of H-bonds between mesogen and non-mesogen. Theoretical NMR spectra for the optimized mesogen – non-mesogen supermolecules were obtained using quantum-chemical calculations on the base of DFT method.

Keywords: liquid crystals, mixtures, non-mesomorphic additives, H-bond, NMR spectroscopy, quantum-chemical methods