Slow Photoelectron Velocity-Map Imaging Spectroscopy of the ortho-Hydroxyphenoxide Anion.
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.
†Department of Chemistry, University of California, Berkeley, California 94720, United States.
Marissa L
ML
Weichman
†Department of Chemistry, University of California, Berkeley, California 94720, United States.
Jongjin B
JB
Kim
†Department of Chemistry, University of California, Berkeley, California 94720, United States.|‡Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States.
Daniel M
DM
Neumark
D000838:Anions / Q000737:chemistry; D008958:Models, Molecular; D010642:Phenoxyacetates / Q000737:chemistry*; D056951:Photoelectron Spectroscopy
D000838:Anions; D010642:Phenoxyacetates; C060827:4-hydroxyphenoxyacetic acid