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Spectroscopy, photophysical and photochemical properties of bisimidazole derivatives

Paper ID Volume ID Publish Year Pages File Format Full-Text
28175 44063 2007 9 PDF Available
Title
Spectroscopy, photophysical and photochemical properties of bisimidazole derivatives
Abstract

Novel bisimidazole derivatives were synthesized and their physico-chemical properties were determined. Different bisimidazole derivatives exhibit solvatochromism, halochromism and photochromism in solution.We have conducted an investigation of the spectroscopy, photophysical and photochemical properties of all derivatives. The photochemical properties of 1, 3 and their derivatives, were studied by irradiating acetonitrile solutions with medium-pressure xenon lamp and their photochemical quantum yields, ranging from 0.0011 to 0.0024, together with the corresponding fluorescence quantum yields, ranging from 0.52 to 0.90, and life-times, ranging from 1.03 to 1.42 ns, were determined. The photophysics of these bisimidazole derivatives was studied in details. The photochemistry of the two prototype derivatives was studied in solutions, showing an interesting general photochemical reaction between these derivatives and molecular oxygen.

Keywords
Bisimidazole; Lophine; Fluorescence
First Page Preview
Spectroscopy, photophysical and photochemical properties of bisimidazole derivatives
Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 188, Issue 1, 30 April 2007, Pages 25–33
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering