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Photoisomerization mechanism of the cis isomers of 1,2-distyrylbenzene and two hetero-analogues

Paper ID Volume ID Publish Year Pages File Format Full-Text
27729 44039 2008 6 PDF Available
Title
Photoisomerization mechanism of the cis isomers of 1,2-distyrylbenzene and two hetero-analogues
Abstract

The radiative and reactive excited state relaxations of the ZE and ZZ geometrical isomers of 1,2-distyrylbenzene [1,2-(PhE)2B] and two hetero-analogues, where the side phenyl groups were replaced by 4′-pyridyl or 2′-thienyl groups, were studied and compared with the photobehaviour of the EE isomers previously investigated.The ZE and ZZ isomers of the hydrocarbon photoisomerize by a predominant adiabatic mechanism (a “one photon – two bonds” process is also operative in the case of ZZ) whereas the contribution of the adiabatic pathway is reduced for the thienyl-analogues, which isomerize by a mixed (diabatic/adiabatic) mechanism, whereas a prevalent diabatic mechanism characterizes the behaviour of the pyridyl analogue.

Keywords
1,2-Distyrylbenzene; Thio-1,2-distyrylbenzenes; Photoreaction mechanism
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Photoisomerization mechanism of the cis isomers of 1,2-distyrylbenzene and two hetero-analogues
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Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 195, Issues 2–3, 15 April 2008, Pages 301–306
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
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