Entropy-controlled supramolecular photochirogenesis: enantiodifferentiating Z-E photoisomerization of cyclooctene included and sensitized by permethylated 6-O-benzoyl-beta-cyclodextrin |
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Authors: | Fukuhara Gaku Mori Tadashi Wada Takehiko Inoue Yoshihisa |
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Institution: | Department of Molecular Chemistry, 2-1 Yamada-oka, Suita 565-0871, Japan. |
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Abstract: | In contrast to the photosensitization with a non-methylated analogue, supramolecular photochirogenesis with a novel permethylated mono(6-O-benzoyl)-beta-cyclodextrin exhibited a critical dependence of the product's enantiomeric excess upon temperature, and possessed a large differential entropy of activation (-11 J K(-1) mol(-1)) for which the flexible host skeleton is likely to be responsible. |
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