posted on 2019-10-11, 17:36authored byHelgi Rafn Hrodmarsson, Gustavo A. Garcia, Laurent Nahon, Bérenger Gans, Jean-Christophe Loison
We
report on the photoionization of the resonance-stabilized anilino
radical (C6H5NH) formed by H atom abstraction
from aniline by F atoms in a flow tube. The spectra were recorded
from 7.8 to 9.7 eV by using a double-imaging photoelectron/photoion
coincidence spectrometer with VUV radiation provided by the DESIRS
beamline at the SOLEIL synchrotron. The vibrationally resolved recorded
threshold photoelectron spectrum of the anilino radical showed transitions
to the ground X+1A′ ← X2A″
and first excited states a+3A″ ← X2A″ of the cation, which were assigned through comparison with
theoretically simulated spectra, yielding an adiabatic ionization
energy of 8.02 ± 0.02 eV. These results are discussed in light
of existing data on the picolyl structural isomers and are of interest
for the analytical applications of coincidence techniques in real-time
combustion analysis where these intermediates are found.