Molecular recognition study on a supramolecular system (XV) - Molecular recognition of aliphatic alcohols by some phenyl-selenium modified β-cyclodextrins

Document Type

Article

Publication Date

1-1-1998

Abstract

The spectrophotometric titrations have been performed at 298.15 K in buffered aqueous solution (pH 7.20) to give the stability constants (logKs) for the supramolecular system formed by mono-[6-(phenylseleno)-6-deoxy]-β-cyclodextrin (2), mono[6-(p-tolylseleno)-6-deoxy]-β-cyclodextrin (3), mono-[6-(o-tolylseleno)-6-deoxy]-β-cyclodextrin (4), mono-[6-(m-tolylseleno)-6-deoxy]-β-cyclodextrin (5) with a series of aliphatic alcohols. The results were compared with the data reported for the parent β-cyclodextrin. The molecular binding ability and selectivity for aliphatic alcohols of modified β-cyclodextrins (2-5) were discussed from the viewpoints of the induced-fit and geometrical complement. The results obtained indicate that the phenylseleno moiety of β-cyclodextrin derivatives (2-5) as a probe for spectrometry can enhance not only the molecular binding ability but also the molecular recognition ability.

Publication Source (Journal or Book title)

Chinese Science Bulletin

First Page

1011

Last Page

1015

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