Identification of nematic lymoesophases with discotic and cylindrical micelles in lyotropic amphiphilic systems |
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| Authors: | E O Kiĭrend S P Chumakova T I Pehk |
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| Institution: | (1) National Institute of Chemical Physics and Biophysics, Tallinn, Estonia;(2) Shubnikov Institute of Crystallography, Russian Academy of Sciences, Leninskiĭ pr. 59, Moscow, 119333, Russia |
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| Abstract: | Nematic lyomesophases with discotic (N D) and cylindrical (N C) micelles in complex multicomponent lyotropic systems based on alkyltrimethylammonium bromide detergents have been identified by the 1H-2H-, and 13C-NMR methods and polarizationoptical microscopy. The difference in the structures of the N D and N C nematic phases is especially pronounced in the 13C-NMR spectra. Addition of chiral dopants to the lyomixture facilitates formation of the Ch D and Ch C cholesteric phases. According to the 13C-NMR spectra, the micellar mobility in the cholesteric lyomesophases decreases in comparison with the nematic ones. The alignment of lyocholesterics under the action of an external magnetic field is found. |
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