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The measurements of the polarized absorption and fluorescence spectra of stilbene-derivative guest molecules dissolved in some nematic liquid crystals have been used for studies of the long-range orientational order in thin aligned samples. The temperature dependence of the order parameters (P 2) and (P 4) has been investigated. The influence of the molecular structure on the orientational order in nematics has been discussed.
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Moryson et al. (1994) studied this question.
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