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Direct versus indirect H atom elimination from photoexcited phenol molecules

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Iqbal, Azhar, Pegg, Lara-Jane and Stavros, Vasilios G. (2008) Direct versus indirect H atom elimination from photoexcited phenol molecules. Journal of Physical Chemistry A, Vol.112 (No.39). pp. 9531-9534. doi:10.1021/jp802155b

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Official URL: http://dx.doi.org/10.1021/jp802155b

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Abstract

The active role of the optically dark pi sigma* state, following UV absorption, has been implicated in the photochemistry of a number of biomolecules. This work focuses on the role of the pi sigma* state in the photochemistry of phenol upon excitation at 200 nm. By probing the neutral hydrogen following UV excitation, we show that hydrogen elimination along the dissociative pi sigma* potential energy surface occurs within 103 30 fs, indicating efficient coupling at the S-1/S-2 and S-0/S-2 conical intersections, with no identifiable role of statistical unimolecular decay of vibronically excited (SO) phenol in the timeframe of our measurements.

Item Type: Journal Article
Subjects: Q Science > QD Chemistry
Q Science > QP Physiology
Divisions: Faculty of Science > Chemistry
Library of Congress Subject Headings (LCSH): Elimination reaction, Photochemistry, Phenol
Journal or Publication Title: Journal of Physical Chemistry A
Publisher: American Chemical Society
ISSN: 1089-5639
Official Date: 2 October 2008
Dates:
DateEvent
2 October 2008Published
Volume: Vol.112
Number: No.39
Number of Pages: 4
Page Range: pp. 9531-9534
DOI: 10.1021/jp802155b
Status: Peer Reviewed
Publication Status: Published
Funder: Royal Society (Great Britain), Engineering and Physical Sciences Research Council (EPSRC), University of Warwick
Grant number: EP/E011187 (EPSRC)

Data sourced from Thomson Reuters' Web of Knowledge

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