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Heteroatom effect on the radiative and reactive photobehaviour of E,E-1,2-distyrylbenzene

Paper ID Volume ID Publish Year Pages File Format Full-Text
28244 44066 2007 7 PDF Available
Title
Heteroatom effect on the radiative and reactive photobehaviour of E,E-1,2-distyrylbenzene
Abstract

The heteroatom effect on the radiative and reactive relaxations of E,E-1,2-distyrylbenzene (DSB) has been studied by stationary and time-resolved techniques on three compounds where the side phenyl (Ph) groups were replaced by 4′-pyridyl (4P), 2′-thienyl (2T) and 2′-furyl (2F) groups. Contrary to the case of the hydrocarbon, whose photoisomerization is accompanied by substantial degradation, the E,E → Z,E photoisomerization prevails in the hetero-analogues, particularly in the thienyl derivative. The lack of conjugation in these 1,2-substituted benzenes leads to a decrease in the fluorescence yield with respect to their 1,4 and 1,3 analogues (particularly in the presence of the heteroatoms), which is accompanied by an increase of the photoreaction quantum yield for the pyridyl- (significant) and thienyl- (very small) derivatives, whilst internal conversion is the prevalent deactivation pathway of the furyl derivative.

Keywords
Di-(heteroarylethenyl)benzenes; Photoisomerization; Fluorescence
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Heteroatom effect on the radiative and reactive photobehaviour of E,E-1,2-distyrylbenzene
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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 325–331
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
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Price was $35.95
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