Confonmational Analysis of Chain Molecules in Liquid Crystalline Phases by a Rotational Isomeric State Scheme with Maximum Entropy Method(2)2H NMR Quadrupolar Splittings from n-Decane and 1,6-Dimethoxyhexane Dissolved in 4'-Methoxybenzylidene-4-n-butylaniline

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  • SASANUMA Yuji
    Department of Materials Technology, Faculty of Engineering, Chiba University, 1-33 Yayoi-cho, Inage-ku, Chiba 263-8522, Japan

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  • Conformational Analysis of Chain Molecules in Liquid Crystalline Phases by a Rotational Isomeric State Scheme with Maximum Entropy Method. II. 2H NMR Quadrupolar Splittings from n-Decane and 1,6-Dimethoxyhexane Dissolved in 4'-Methoxybenzylidene-4-n-butylaniline.
  • Conformational Analysis of Chain Molecules in Liquid Crystalline Phases by a Rotational Isomeric State Scheme with Maximum Entropy Method II. 2H NMR Quadrupolar Splittings from n-Decane and 1,6-Dimethoxyhexane Dissolved in 4′-Methoxybenzylidene-4-n-butylaniline

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説明

By a rotational isomeric state scheme with the maximum entropy method [Y. Sasanuma, Polym. J., 10, 883 (2000)], conformational analysis of n-decane and 1, 6-dimethoxyhexane dissolved in a nematic liquid crystal 4´-methoxybenzylidene-4-n-butylaniline (MBBA) was carried out based on 2H NMR quadrupolar splittings from perdeuterated compounds at different temperatures and concentrations. All experimental observations were exactly reproduced by simulation. In MBBA, solute chains are more rigid and extended than in the free state. 1, 6-Dimethoxyhexane was found to keep its intrinsic conformational characteristics even in nematic solvent; the gauche fraction of the OC-CC bond was comparatively large. Orientational order parameters ‹SZZ› of the two solutes, plotted against reduced temperature, formed a master curve and were linearly correlated to ‹SZZ› of MBBA within the observed range.

収録刊行物

  • Polymer Journal

    Polymer Journal 32 (10), 890-894, 2000

    The Society of Polymer Science, Japan

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