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Fluorescent properties of hydrogen-bonded ellipticine: A special effect of fluoride anion

Paper ID Volume ID Publish Year Pages File Format Full-Text
29062 44117 2006 6 PDF Available
Title
Fluorescent properties of hydrogen-bonded ellipticine: A special effect of fluoride anion
Abstract

Fluorescence properties of ellipticine, a plant alkaloid, was studied in the presence of hydrogen-bond acceptors, such as F−, CH3COO−, 1,8-diazabicyclo[5.4.0]undec-7-ene (DBU) and N-methylimidazole in different solvents. Global analysis of the spectrophotometric titration data proved that ellipticine deprotonation in the ground state occurred only in the case of the interaction with two F− anions in acetonitrile. The fluorescence band of the 1:1 complex of anions showed large Stokes shift implying significant proton displacement upon excitation along the hydrogen-bond. The lack of ellipticine-DBU complex emission was rationalized by quick proton transfer in the excited state. The kinetics and mechanism of the excited ellipticine quenching were also revealed.

Keywords
Ellipticine; Fluorescence; Hydrogen bonding; Proton transfer; Quenching
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Fluorescent properties of hydrogen-bonded ellipticine: A special effect of fluoride anion
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Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 182, Issue 1, 20 August 2006, Pages 82–87
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
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Price was $35.95
You save - $31
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