Abstract
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.
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Sasanuma, Y. 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. Polym J 32, 890–894 (2000). https://doi.org/10.1295/polymj.32.890
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DOI: https://doi.org/10.1295/polymj.32.890