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Anion Resonances of para-Benzoquinone Probed by Frequency-Resolved Photoelectron Imaging

West, C.W.; Bull, J.N.; Antonkov, E.; Verlet, J.R.R.

Anion Resonances of para-Benzoquinone Probed by Frequency-Resolved Photoelectron Imaging Thumbnail


Authors

C.W. West

J.N. Bull

E. Antonkov



Abstract

The resonant attachment of a free electron to a closed shell neutral molecule and the interplay between the following electron detachment and electronic relaxation channels represents a fundamental but common process throughout chemical and biochemical systems. The new methodology of anion frequency-resolved photoelectron imaging is detailed and used to map out molecular excited state dynamics of gas-phase para-benzoquinone, which is the electron accepting moiety in many biological electron-transfer chains. Three-dimensional spectra of excitation energy, electron kinetic energy, and electron ejection anisotropy reveal clear fingerprints of excited and intermediate state dynamics. The results show that many of the excited states are strongly coupled, providing a route to forming the ground state radical anion, despite the fact that the electron is formally unbound in the excited states. The relation of our method to electron impact attachment studies and the key advantages, including the extension to time-resolved dynamics and to larger molecular systems, are discussed.

Citation

West, C., Bull, J., Antonkov, E., & Verlet, J. (2014). Anion Resonances of para-Benzoquinone Probed by Frequency-Resolved Photoelectron Imaging. The Journal of Physical Chemistry A, 118(48), 11346-11354. https://doi.org/10.1021/jp509102p

Journal Article Type Article
Publication Date Dec 4, 2014
Deposit Date Feb 18, 2015
Publicly Available Date Mar 28, 2024
Journal The Journal of Physical Chemistry A
Print ISSN 1089-5639
Electronic ISSN 1520-5215
Publisher American Chemical Society
Peer Reviewed Peer Reviewed
Volume 118
Issue 48
Pages 11346-11354
DOI https://doi.org/10.1021/jp509102p

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Copyright Statement
This document is the Accepted Manuscript version of a Published Work that appeared in final form in Journal of physical chemistry A, copyright © 2014 American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see http://dx.doi.org/10.1021/jp509102p.




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