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Fluorescence quenching inhibition of substituted indoles by neutral and ionized cyclodextrins nanocavities

Paper ID Volume ID Publish Year Pages File Format Full-Text
28248 44066 2007 7 PDF Available
Title
Fluorescence quenching inhibition of substituted indoles by neutral and ionized cyclodextrins nanocavities
Abstract

The effect of cyclodextrins (CDs) in the excited state proton transfer process of indole compounds has been studied by fluorescence quenching, in acid and alkaline media. The quenching efficiency decreases in the presence of CDs in both media indicating a remarkable protection mediated by CD against external quenchers. An interesting non-linear behaviour for the Stern–Volmer plots was observed in basic media. This was interpreted as total inhibition of the quenching process by ionized cyclodextrin. Induced circular dichroism has been used to determine the indole position into the cyclodextrin cavities.

Keywords
Cyclodextrins protection; Excited state proton transfer; Induced quenching; Substituted indole fluorescence; Acid and basic media; Ionized cyclodextrin quenching inhibition
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Fluorescence quenching inhibition of substituted indoles by neutral and ionized cyclodextrins nanocavities
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Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 187, Issues 2–3, 15 April 2007, Pages 356–362
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
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Any Questions? feel free to contact us