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Vibrational Autodetachment from Anionic Nitroalkane Chains - From Molecular Signatures to Thermionic Emission

Journal article
Authors Christopher Adams
Klavs Hansen
J. Mathias Weber
Published in Journal of Physical Chemistry A
Volume 123
Issue 40
Pages 8562-8570
ISSN 1089-5639
Publication year 2019
Published at Department of Physics (GU)
Pages 8562-8570
Language en
Links https://doi.org/10.1021/acs.jpca.9b...
Subject categories Chemical physics, Chemical physics, Atom and Molecular Physics and Optics

Abstract

We report the kinetic energy distributions in electron autodetachment from nitroethane, 1-nitropropane, and 1-nitrobutane anions upon laser excitation of CH stretching modes measured using velocity map electron imaging. In striking contrast to the case of nitromethane, the kinetic energy distributions show almost no distinct vibrational features, and they can be described by thermionic emission, relating the shape of the distributions to the electron capture cross section of the neutral molecule. The data suggest that a classical description is warranted above ca. 20 meV electron kinetic energy. At lower energies, quantum effects suppress the attachment cross section.

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