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Supra-molecular structure of TGBC* phases studied by means of Deuterium NMR line-shape analysis

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    0318457 - FZÚ 2009 RIV US eng J - Journal Article
    Domenici, V. - Veracini, C.A. - Hamplová, Věra - Kašpar, Miroslav
    Supra-molecular structure of TGBC* phases studied by means of Deuterium NMR line-shape analysis.
    [Supramolekulární struktura TGBC* fáze – studium pomocí NMR spekroskopie.]
    Molecular Crystals and Liquid Crystals. Roč. 495, č. 11 (2008), s. 133-144. ISSN 1542-1406. E-ISSN 1563-5287
    Institutional research plan: CEZ:AV0Z10100520
    Keywords : banana-shaped * deuterium NMR * magnetic field * rod-like * smectic * twist grain boundary
    Subject RIV: BM - Solid Matter Physics ; Magnetism
    Impact factor: 0.537, year: 2008

    In this work the structure of the tilted TGBC* phase is investigated by means of the line-shape analysis of Deuterium NMR spectra. The case of a rod-like mesogen containing a (S)-2-methylbutyl-(S)-lactate unit in the chiral chain is taken as a representative example for the large temperature range of stability of its tilted TGB* phases. By comparing the experimental and computed Deuterium NMR spectra several structural features can be extracted. For instance, the analysis of Deuterium NMR line-shapes put in evidence the occurrence of helical deformations due to the effect of the external magnetic field.

    Struktura TGBC* fáze byla studována pomocí NMR spektroskopie. Molekula tyčinkového tvaru obsahující 2-methylbutyllaktátovou chirální jednotku byla vybrána jako příklad látky s velmi širokým teplotním rozsahem tiltovaných TGB* fází. Byla pozorována deformace spirálového uspořádání díky vlivu externího magnetického pole.
    Permanent Link: http://hdl.handle.net/11104/0004963

     
     
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