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Type: Journal article
Title: Host-guest complexation of apple antioxidant quercetin by linked β-cyclodextrin dimer
Other Titles: Host-guest complexation of apple antioxidant quercetin by linked [beta]-cyclodextrin dimer
Author: Nguyen, H.
Pham, D.
Lincoln, S.
Citation: Asian Journal of Chemistry: an international peer reviewed research journal of chemistry, 2011; 23(1):116-118
Publisher: Chemic Publishing Company
Issue Date: 2011
ISSN: 0970-7077
Statement of
Hoa-Du Nguyen, Duc-Truc Pham and Stephen F. Lincoln
Abstract: In aqueous phosphate buffer at pH 7.0 (3.3 % ethanol, I = 0.10 mol dm -3 at 298.2 K) quercetin forms host-guest complexes with β-cyclodextrin (βCD) and N,N'-bis(6A-deoxy-6 A-β-cyclodextrinyl)urea (66βCD2ur) of stoichiometry βCD.Qc and 66βCD2ur.Qc, the analogous K 1 = 537 and 1901 dm3 mol-1, respectively, showing a good cooperative binding of two annuli of the dimer to the guest. The complexation of quercetin (Qc) by β-cyclodextrin (βCD) and N,N'-bis(6A-deoxy-6A-b-cyclodextrin) urea (66βCD2ur) in D2O was studied by 2D ROESY 1H NMR provided evidence for complexation of quercetin into βCD annuli. The models of complexes were constructed and energy minimized.
Keywords: Host-guest complexation
Rights: Copyright © 2010 Asian Journal of Chemistry
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Appears in Collections:Aurora harvest
Chemistry publications
Environment Institute publications

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