Cate S. Anstöter
Electronic structure of the para-dinitrobenzene radical anion: a combined 2D photoelectron imaging and computational study
Anstöter, Cate S.; Gartmann, Thomas E.; Stanley, Laurence H.; Bochenkova, Anastasia V.; Verlet, Jan R.R.
Authors
Thomas E. Gartmann
Laurence H. Stanley
Anastasia V. Bochenkova
Professor Jan Verlet j.r.r.verlet@durham.ac.uk
Head Of Department
Abstract
The para-dinitrobenzene radical anion has been studied by 2D photoelectron imaging within the energy range of 2.5 eV above the detachment threshold. Supporting electronic structure calculations at the XMCQDPT2 level of the excited states and resonances are presented. The direct photodetachment channel has been observed and modelled, and yields an electron affinity of 1.99 ± 0.01 eV. In addition to the direct channel, evidence of resonances is observed. These resonances, which are symmetry allowed for photoexcitation from the ground state and of Feshbach types with respect to the open continuum, result in fast internal conversion to bound electronic states, followed by statistical electron emission observed at very low kinetic energies as well as dissociation of the nitrite anion. The latter is seen in the photoelectron spectra, which can be modelled as a combination of direct detachment from the para-dinitrobenzene and nitrite anions. An additional dimension has been offered by the 2D photoelectron angular distribution that is particularly sensitive to a mechanism of electron detachment, allowing us to confidently interpret the production of the nitrite anion photofragment.
Citation
Anstöter, C. S., Gartmann, T. E., Stanley, L. H., Bochenkova, A. V., & Verlet, J. R. (2018). Electronic structure of the para-dinitrobenzene radical anion: a combined 2D photoelectron imaging and computational study. Physical Chemistry Chemical Physics, 20(37), 24019-24026. https://doi.org/10.1039/c8cp04877k
Journal Article Type | Article |
---|---|
Acceptance Date | Sep 11, 2018 |
Online Publication Date | Sep 11, 2018 |
Publication Date | Oct 7, 2018 |
Deposit Date | Oct 15, 2018 |
Publicly Available Date | Sep 11, 2019 |
Journal | Physical Chemistry Chemical Physics |
Print ISSN | 1463-9076 |
Electronic ISSN | 1463-9084 |
Publisher | Royal Society of Chemistry |
Peer Reviewed | Peer Reviewed |
Volume | 20 |
Issue | 37 |
Pages | 24019-24026 |
DOI | https://doi.org/10.1039/c8cp04877k |
Public URL | https://durham-repository.worktribe.com/output/1316074 |
Files
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(879 Kb)
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