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Torsional motion of the chromophore catechol following the absorption of ultraviolet light

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Young, Jamie D., Staniforth, Michael, Paterson, M. J. and Stavros, Vasilios G. (2015) Torsional motion of the chromophore catechol following the absorption of ultraviolet light. Physical Review Letters, 114 (23). 233001 . doi:10.1103/PhysRevLett.114.233001

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Official URL: http://dx.doi.org/10.1103/PhysRevLett.114.233001

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Abstract

The ability to probe energy flow in molecules, following the absorption of ultraviolet light, is crucial to unraveling photophysical phenomena. Here we excite a coherent superposition of vibrational states in the first excited electronic state (S1) in catechol, resulting in a vibrational wave packet. The observed quantum beats, assigned to superpositions of the low-frequency, and strongly mixed, O–H torsional mode τ2, elegantly demonstrate how changes in geometry upon photoionization from the S1 state to the ground state of the cation (D0) enables one to probe energy flow at the very early stages of photoexcitation in this biological chromophore.

Item Type: Journal Article
Subjects: Q Science > QD Chemistry
Divisions: Faculty of Science, Engineering and Medicine > Science > Chemistry
Library of Congress Subject Headings (LCSH): Catechol, Photoionization
Journal or Publication Title: Physical Review Letters
Publisher: American Physical Society
ISSN: 0031-9007
Official Date: 8 June 2015
Dates:
DateEvent
8 June 2015Published
Volume: 114
Number: 23
Article Number: 233001
DOI: 10.1103/PhysRevLett.114.233001
Status: Peer Reviewed
Publication Status: Published
Access rights to Published version: Open Access
Funder: University of Warwick, Engineering and Physical Sciences Research Council (EPSRC), Seventh Framework Programme (European Commission) (FP7), Royal Society (Great Britain)
Grant number: 258990 (FP7), EP/J007153 (EPSRC)

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