Slow Photoelectron Velocity-Map Imaging Spectroscopy of the ortho-Hydroxyphenoxide Anion

The Journal of Physical Chemistry. a
Marissa L WeichmanDaniel M Neumark

Abstract

We report high-resolution photodetachment spectra of cryogenically cooled ortho-hydroxyphenoxide anions (o-HOC6H4O(-)) using slow photoelectron velocity-map imaging spectroscopy (cryo-SEVI). We observe transitions to the three lowest-lying electronic states of the ortho-hydroxyphenoxy radical, and resolve detailed vibrational features. Comparison to Franck-Condon simulations allows for clear assignment of vibronic structure. We find an electron affinity of 2.3292(4) eV for the neutral X̃(2)A″ ground state, improving upon the accuracy of previous experiments. We measure term energies of 1.4574(7) eV and 1.5922(48) eV for the Ã(2)A' and B̃(2)A″ excited states respectively, representing their first resolution and clear assignment. Photodetachment threshold effects are considered to explain the structure of these bands.

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Citations

Jan 23, 2016·Proceedings of the National Academy of Sciences of the United States of America·Marissa L WeichmanDaniel M Neumark
Sep 17, 2015·The Journal of Chemical Physics·Andrew J A HarveyCaroline E H Dessent
Oct 27, 2016·The Journal of Chemical Physics·Allan M OliveiraW Carl Lineberger
Feb 24, 2017·The Journal of Chemical Physics·Daniel J NelsonW Carl Lineberger
Jul 10, 2017·The Journal of Chemical Physics·Jessalyn A DeVineDaniel M Neumark
Nov 10, 2018·The Journal of Chemical Physics·Mark C BabinDaniel M Neumark
Jun 13, 2018·The Journal of Physical Chemistry. a·Thomas K OrmondG Barney Ellison

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