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Photoelectron spectroscopy of para-benzoquinone cluster anions

Mensa-Bonsu, Golda; Wilson, Mark R.; Tozer, David J.; Verlet, Jan R.R.

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Golda Mensa-Bonsu


The photoelectron spectra of para-benzoquinone radical cluster anions, (pBQ)n− (n = 2–4), taken at hv = 4.00 eV are presented and compared with the photoelectron spectrum of the monomer (n = 1). For all clusters, a direct detachment peak can be identified, and the incremental increase in the vertical detachment energy of ∼0.4 eV n−1 predominantly reflects the increase in cohesion energy as the cluster size increases. For all clusters, excitation also leads to low energy electrons that are produced by thermionic emission from ground electronic state anionic species, indicating that resonances are excited at this photon energy. For n = 3 and 4, photoelectron features at lower binding energy are observed which can be assigned to photodetachment from pBQ− for n = 3 and both pBQ− and (pBQ)2− for n = 4. These observations indicate that the cluster dissociates on the time scale of the laser pulse (∼5 ns). The present results are discussed in the context of related quinone cluster anions.


Mensa-Bonsu, G., Wilson, M. R., Tozer, D. J., & Verlet, J. R. (2019). Photoelectron spectroscopy of para-benzoquinone cluster anions. The Journal of Chemical Physics, 151(20), Article 204302.

Journal Article Type Article
Acceptance Date Nov 11, 2019
Online Publication Date Nov 26, 2019
Publication Date Nov 28, 2019
Deposit Date Dec 10, 2019
Publicly Available Date Nov 26, 2020
Journal Journal of Chemical Physics
Print ISSN 0021-9606
Electronic ISSN 1089-7690
Publisher American Institute of Physics
Peer Reviewed Peer Reviewed
Volume 151
Issue 20
Article Number 204302


Published Journal Article (1.8 Mb)

Copyright Statement
© 2019 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in Mensa-Bonsu, Golda, Wilson, Mark R., Tozer, David J. & Verlet, Jan R. R. (2019). Photoelectron spectroscopy of para-benzoquinone cluster anions. The Journal of Chemical Physics 151(20): 204302 and may be found at

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