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Efficient “antenna effect” in the complex of (+) catechin and Tb(III) lodged inside the nano-cavity of β-cyclodextrin

Paper ID Volume ID Publish Year Pages File Format Full-Text
26653 43969 2013 7 PDF Available
Title
Efficient “antenna effect” in the complex of (+) catechin and Tb(III) lodged inside the nano-cavity of β-cyclodextrin
Abstract

A complex of Tb(III) with (+) catechin (C) has been profitably encapsulated within the β-CD cavity at physiological pH = 6.9 in aqueous medium. The ternary system exhibits a remarkable ‘antenna effect’ compared to the complex of Tb(III) with C. Time resolved measurement of Tb(III) emission in H2O and in D2O directly proves the protection of Tb(III) from OH oscillator within the cavity. The rotational correlation time of bound C obtained from time resolved anisotropy further confirms the motional restriction of C in the ternary system providing enhanced energy transfer efficiency. The simple system may help improve designing imaging technique in aqueous medium.

Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slideHighlights► We encapsulate successfully Tb(III) complex within the nano cavity of β-CD. ► We choose a ligand which has the ability to bind Tb(III) as well as to penetrate in the interior of the cavity. ► A remarkable enhance ‘antenna effect’ is observed due to effective shielding of Tb(III) and restricted motion of the ligand within the cavity. ► The ternary system may help design an improved imaging technique in aqueous medium.

Keywords
Lanthanide; Encapsulation; Coordinated water; Sensitization; Correlation time
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Efficient “antenna effect” in the complex of (+) catechin and Tb(III) lodged inside the nano-cavity of β-cyclodextrin
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Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 252, 15 January 2013, Pages 145–151
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us