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UV protection and singlet-oxygen quenching activity of intramolecularly hydrogen-bonded hydroxyanthraquinone derivatives found in aloe

Paper ID Volume ID Publish Year Pages File Format Full-Text
26679 43970 2011 7 PDF Available
Title
UV protection and singlet-oxygen quenching activity of intramolecularly hydrogen-bonded hydroxyanthraquinone derivatives found in aloe
Abstract

The UV protection and singlet-oxygen (1O2) quenching activity of intramolecularly hydrogen-bonded hydroxyanthraquinone derivatives found in aloe have been studied by means of laser spectroscopy. The UV protective activity provided by excited-state intramolecular proton-transfer (ESIPT) in these molecules correlates with their 1O2 quenching activity, and the UV protective molecules have high 1O2-quenching function. The reason for this correlation can be understood by considering ESIPT-induced distortion of ground-state potential surfaces in encounter complexes with 1O2.

► Aloe species contain various intramolecularly hydrogen-bonded hydroxyanthraquinones. ► We study their UV protective and 1O2 quenching activities using laser spectroscopy. ► Those two activities positively correlate with each other. ► The reason for this correlation is explained in this paper.

Keywords
Aloe; UV protection; Singlet oxygen; Hydroxyanthraquinone; ESIPT
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UV protection and singlet-oxygen quenching activity of intramolecularly hydrogen-bonded hydroxyanthraquinone derivatives found in aloe
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Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 225, Issue 1, 1 December 2011, Pages 106–112
Authors
, , , , , ,
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