Ultrafast dynamics of the S-1 excited state of benzene

DSN Parker; RS Minns; Thomas Penfold; Graham Worth; HH Fielding

doi:10.1016/j.cplett.2008.12.069

Ultrafast dynamics of the S-1 excited state of benzene

DSN Parker, RS Minns, Thomas Penfold, Graham Worth, HH Fielding

Chemistry

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Abstract

We investigate the ultrafast intramolecular dynamics of electronically and vibrationally excited benzene using time-resolved photoelectron spectroscopy and quantum dynamics simulations. In addition to an ultrafast initial decay, we observe an oscillation between two states. We interpret this data in terms of excited state population moving away from the Franck-Condon region towards the singlet-singlet conical intersection with the ground-state, where ultrafast intersystem crossing from the initially populated singlet state to an optically dark triplet state is enhanced. Our results challenge the currently accepted view that intramolecular processes in hydrocarbons which involve a change of spin are negligibly slow. (C) 2008 Elsevier B.V. All rights reserved.

Original language	English
Pages (from-to)	43-47
Number of pages	5
Journal	Chemical Physics Letters
Volume	469
Issue number	1-3
DOIs	https://doi.org/10.1016/j.cplett.2008.12.069
Publication status	Published - 1 Feb 2009

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abstract = "We investigate the ultrafast intramolecular dynamics of electronically and vibrationally excited benzene using time-resolved photoelectron spectroscopy and quantum dynamics simulations. In addition to an ultrafast initial decay, we observe an oscillation between two states. We interpret this data in terms of excited state population moving away from the Franck-Condon region towards the singlet-singlet conical intersection with the ground-state, where ultrafast intersystem crossing from the initially populated singlet state to an optically dark triplet state is enhanced. Our results challenge the currently accepted view that intramolecular processes in hydrocarbons which involve a change of spin are negligibly slow. (C) 2008 Elsevier B.V. All rights reserved.",

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T1 - Ultrafast dynamics of the S-1 excited state of benzene

AU - Parker, DSN

AU - Minns, RS

AU - Penfold, Thomas

AU - Worth, Graham

AU - Fielding, HH

PY - 2009/2/1

Y1 - 2009/2/1

N2 - We investigate the ultrafast intramolecular dynamics of electronically and vibrationally excited benzene using time-resolved photoelectron spectroscopy and quantum dynamics simulations. In addition to an ultrafast initial decay, we observe an oscillation between two states. We interpret this data in terms of excited state population moving away from the Franck-Condon region towards the singlet-singlet conical intersection with the ground-state, where ultrafast intersystem crossing from the initially populated singlet state to an optically dark triplet state is enhanced. Our results challenge the currently accepted view that intramolecular processes in hydrocarbons which involve a change of spin are negligibly slow. (C) 2008 Elsevier B.V. All rights reserved.

AB - We investigate the ultrafast intramolecular dynamics of electronically and vibrationally excited benzene using time-resolved photoelectron spectroscopy and quantum dynamics simulations. In addition to an ultrafast initial decay, we observe an oscillation between two states. We interpret this data in terms of excited state population moving away from the Franck-Condon region towards the singlet-singlet conical intersection with the ground-state, where ultrafast intersystem crossing from the initially populated singlet state to an optically dark triplet state is enhanced. Our results challenge the currently accepted view that intramolecular processes in hydrocarbons which involve a change of spin are negligibly slow. (C) 2008 Elsevier B.V. All rights reserved.

U2 - 10.1016/j.cplett.2008.12.069

DO - 10.1016/j.cplett.2008.12.069

M3 - Article

VL - 469

SP - 43

EP - 47

JO - Chemical Physics Letters

JF - Chemical Physics Letters

IS - 1-3

ER -

Ultrafast dynamics of the S-1 excited state of benzene

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