Anion Photoelectron Imaging Spectroscopy of CFX (X = F, Cl, Br, I).

The photoelectron (PE) spectra of CFX (X = Cl, Br, I) and computational results on the anions and neutrals are presented and compared to previously reported results on CF [McGee, C. J. 2023, 127, 8556-8565.

Isomer-Dependent Electron Affinities of Fluorophenyl Radicals, CHF (2 ≤ ≤ 4).

Di-, tri-, and tetrafluorophenyl radicals each have three regioisomers, several of which can form multiple distinct radical structures. We present the photoelectron spectra of the di-, tri-, and tetrafluorophenide regioisomer anions generated from their associated fluorobenzene precursors. By comparing the spectra to the results of density functional theory calculations, we determine that in cases where more than one possible radical isomer is possible for a given regioisomer (radicals formed from 1,2-difluorobenzene, 1,3-difluorobenzene, 1,2,3-trifluorobenzene, and 1,2,4-trifluorobenzene) the most stable anion corresponds to a less stable neutral, suggesting that the reactive C-center on these fluorine-substituted phenyl groups can be controlled by charge state.

Anion Photoelectron Imaging Spectroscopy of CHF, CF, and the Absence of CHF.

Substituents have a profound effect on the electronic structure of the benzene molecule. In this paper, we present new photoelectron spectra of the CHF molecular anion, to test predictions [ 2017, 188, e25504] that pentafluorobenzene has a positive electron affinity, as hexafluorobenzene was already known to have. The PE spectrum of CHF exhibits a broad and vibrationally unresolved band due to significant differences between the structure of the anion and the neutral.

Trend in the Electron Affinities of Fluorophenyl Radicals ·CHF (1 ≤ ≤ 4).

The electron affinities (EAs) of a series of ·CHF (1 ≤ ≤ 4) fluorophenyl radicals are determined from the photoelectron spectra of their associated fluorophenide anions generated from CHF (1 ≤ ≤ 4) fluorobenzene precursors. The spectra show a near-linear incremental increase in EA of 0.4 eV/.

Autodetachment over Broad Photon Energy Ranges in the Anion Photoelectron Spectra of [O-] ( = Glyoxal, Methylglyoxal, or Biacetyl) Complex Anions.

Complexes of anion-neutral pairs are prevalent in chemical and physical processes in the interstellar medium, the atmosphere, and biological systems, among others. However, bimolecular anionic species that cannot be described as simple ion-molecule complexes due to their competitive electron affinities have received less attention. In this study, the [O-] ( = glyoxal, methylglyoxal, or biacetyl) anion photoelectron spectra obtained with several different photon energies are reported and interpreted in the context of calculations.