Ultrafast photochemical processes in 1,2-dichloroethene measured with a universal XUV probe
Ultrafast photochemical processes in 1,2-dichloroethene measured with a universal XUV probe
The presence of two chlorine atoms in 1,2-dichloroethene allows for isomerization around the double bond. This isomerization can lead to rich photochemistry. We present a time-resolved pump–probe photoelectron spectroscopy measurement on both the cis- and trans- isomers of 1,2-dichloroethene. A universal XUV probe of 22.3 eV is used allowing observation of photoelectrons formed anywhere on the potential energy surface, even from the ground-state or dissociation products. Following excitation with a 200 nm pump both ultrafast excited state dynamics and product formation are observed within the time resolution of the experiment. Excited state population begins to return to the ground state on an ultrafast time scale (<70 fs) and population of products channels is observed on the same timescale. With the aid of ab initio calculations it is found that population transfer from the excited state is facilitated by vibrational modes involving C–C–H bends.
28406-28416
McGhee, Henry G.
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Thompson, Henry J.
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Thompson, James
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Zhang, Yu
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Wyatt, Adam S.
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Springate, Emma
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Chapman, Richard T.
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Horke, Daniel A.
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Minns, Russell S.
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Ingle, Rebecca A.
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Parkes, Michael A.
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30 November 2024
McGhee, Henry G.
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Thompson, Henry J.
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Thompson, James
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Zhang, Yu
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Wyatt, Adam S.
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Springate, Emma
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Chapman, Richard T.
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Horke, Daniel A.
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Minns, Russell S.
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Ingle, Rebecca A.
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Parkes, Michael A.
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McGhee, Henry G., Thompson, Henry J., Thompson, James, Zhang, Yu, Wyatt, Adam S., Springate, Emma, Chapman, Richard T., Horke, Daniel A., Minns, Russell S., Ingle, Rebecca A. and Parkes, Michael A.
(2024)
Ultrafast photochemical processes in 1,2-dichloroethene measured with a universal XUV probe.
Physical Chemistry Chemical Physics, 26 (45), .
(doi:10.1039/D4CP02952F).
Abstract
The presence of two chlorine atoms in 1,2-dichloroethene allows for isomerization around the double bond. This isomerization can lead to rich photochemistry. We present a time-resolved pump–probe photoelectron spectroscopy measurement on both the cis- and trans- isomers of 1,2-dichloroethene. A universal XUV probe of 22.3 eV is used allowing observation of photoelectrons formed anywhere on the potential energy surface, even from the ground-state or dissociation products. Following excitation with a 200 nm pump both ultrafast excited state dynamics and product formation are observed within the time resolution of the experiment. Excited state population begins to return to the ground state on an ultrafast time scale (<70 fs) and population of products channels is observed on the same timescale. With the aid of ab initio calculations it is found that population transfer from the excited state is facilitated by vibrational modes involving C–C–H bends.
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d4cp02952f
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Accepted/In Press date: 29 October 2024
Published date: 30 November 2024
Identifiers
Local EPrints ID: 496279
URI: http://eprints.soton.ac.uk/id/eprint/496279
ISSN: 1463-9076
PURE UUID: f3b0ec9b-dfc8-46bd-8fce-b058e52e939a
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Date deposited: 10 Dec 2024 18:00
Last modified: 11 Dec 2024 02:45
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Author:
Henry G. McGhee
Author:
Henry J. Thompson
Author:
James Thompson
Author:
Yu Zhang
Author:
Adam S. Wyatt
Author:
Emma Springate
Author:
Richard T. Chapman
Author:
Daniel A. Horke
Author:
Rebecca A. Ingle
Author:
Michael A. Parkes
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