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Charged Particle Imaging of the Deprotonated Octatrienoic Acid Anion: Evidence for a Photoinduced Cyclization Reaction

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

Charged Particle Imaging of the Deprotonated Octatrienoic Acid Anion: Evidence for a Photoinduced Cyclization Reaction Thumbnail


Authors

C.W. West

J.N. Bull



Abstract

Photoelectron spectroscopy of the deprotonated octatrienoic acid anion, [C7H9–CO2]−, shows the formation of [C7H9]− and loss of H– at hν = 4.13 eV. Using velocity map imaging, the H– fragment was characterized to have a Boltzmann-like kinetic energy distribution consistent with dissociation on a ground electronic state. Similar dynamics were not observed at hν = 4.66 eV even though there is clear evidence for recovery of the ground electronic state of [C7H9–CO2]−. In accord with supporting electronic structure calculations, the production of H– at hν = 4.13 eV is explained by excited-state dissociation of CO2 to form [C7H9]−, which subsequently undergoes a ring-closure isomerization reaction to yield toluene and H–. These data represent the first evidence for a photoinduced ring-closing isomerization reaction in an anionic polyene and provides an interesting example of the rich anion dynamics that can occur in the detachment continuum and that can influence photochemistry.

Citation

West, C., Bull, J., & Verlet, J. (2016). Charged Particle Imaging of the Deprotonated Octatrienoic Acid Anion: Evidence for a Photoinduced Cyclization Reaction. Journal of Physical Chemistry Letters, 7(22), 4635-4640. https://doi.org/10.1021/acs.jpclett.6b02302

Journal Article Type Article
Acceptance Date Nov 3, 2016
Online Publication Date Nov 3, 2016
Publication Date Nov 3, 2016
Deposit Date Nov 17, 2016
Publicly Available Date Nov 3, 2017
Journal Journal of Physical Chemistry Letters
Electronic ISSN 1948-7185
Publisher American Chemical Society
Peer Reviewed Peer Reviewed
Volume 7
Issue 22
Pages 4635-4640
DOI https://doi.org/10.1021/acs.jpclett.6b02302
Public URL https://durham-repository.worktribe.com/output/1400677

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Copyright Statement
This document is the Accepted Manuscript version of a Published Work that appeared in final form in The journal of physical chemistry letters, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see https://doi.org/10.1021/acs.jpclett.6b02302





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