Investigation of induced circular dichroism of benzo(a)pyrene cyclodextrin complexes

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This study focuses on the inclusion complexes of α-, β- and γ-cyclodextrins with benzo (a) pyrene, as indicated by induced circular dichroism data. The benzo(a)pyrene complex exhibits a significant induced ellipticity in the presence of γ-cyclodextrin, while the other two cyclodextrins did not produce a significant induced circular dichroism signal. In the presence of deuterium oxide, which is larger than the water molecule, the ellipticity is larger. The changes in ellipticity with increasing cyclodextrin concentration are observed to follow the changes in equilibrium of the pyrene-γ-cyclodextrin system. The study of these systems using circular dichroism measurements yields a method of estimating the possible stoichiometry of this complex. © 1991 Kluwer Academic Publishers.

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Journal of Inclusion Phenomena and Molecular Recognition in Chemistry

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