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• W2043711222 abstract "This work studies the interaction of substituted coumarins with β-cyclodextrin (β-CD). The role of the substituent in the 3 position was investigated. The guest molecules were two original 4-hydroxycoumarin derivatives, bearing an ethyl furoate (1) or a benzodioxanyl (2) substituent in the 3 position. Comparison was made with a nonsubstituted analogue (3). It must be noted that molecules 1 and 2 potentially offer very different complexation sites. Formation of the inclusion complex was checked by UV/vis absorption and fluorescence spectroscopy. A strong revival of the fluorescence intensity of 1 and 2 was observed in the presence of β-CD and partly attributed to the fact that the heterocyclic substituent was prevented from rotating freely. The 1:1 stoichiometry of the complex was established, and the values of the binding constants (7 × 102 and 3.4 × 102 M-1 for 1 and 2, respectively) were extracted from the spectrophotometric data. A much lower (8.1 × 101 M-1) binding constant was found for unsubstituted..." @default.
• W2043711222 created "2016-06-24" @default.
• W2043711222 creator A5019421309 @default.
• W2043711222 creator A5062768656 @default.
• W2043711222 date "2001-10-02" @default.
• W2043711222 modified "2023-10-18" @default.
• W2043711222 title "Inclusion Complex of Fluorescent 4-Hydroxycoumarin Derivatives with Native β-Cyclodextrin: Enhanced Stabilization Induced by the Appended Substituent" @default.
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• W2043711222 doi "https://doi.org/10.1021/jp010900h" @default.
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