Low-Energy Photoelectron Imaging Spectroscopy of Anions

Details Low-Energy Photoelectron Imaging Spectroscopy of Anions Low-Energy Photoelectron Imaging Spectroscopy of Anions

Jun 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009mss..confetf01a&link_type=abstract

"International Symposium On Molecular Spectroscopy, 64th Meeting, Held 22-26 June, 2009 at Ohio State University. http://molspec

Physics

Radicals And Ions

Scientific paper

We report on photoelectron emission from nitroalkane anions using low-energy velocity map photoelectron imaging. The excess electron of these radical anions is weakly bound with adiabatic electronic affinities around 1500 cm^{-1} with relatively benign sensitivities to the length of the alkane chain. In addition to conventional photoelectron spectroscopy, we use vibrational excitation of the CH stretching vibration (2700-3000 cm^^{-1}) to induce vibrational autodetachment. We have obtained an improved value for the adiabatic electron affinity (172 ± 6 meV), and definitively assigned the vibrational features in the photoelectron spectrum of the nitromethane anion. In addition, the vibrational autodetachment spectrum offers insight into vibrational modes involved in vibrational autodetachment.

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