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

Author
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.
Year of Publication
2019
Journal
The Journal of Physical Chemistry A
Date Published
2019-09
ISSN Number
1089-5639
URL
https://pubs.acs.org/doi/10.1021/acs.jpca.9b07780
DOI
10.1021/acs.jpca.9b07780
JILA PI
Associated Institutes
Journal Article