https://doi.org/10.1140/epjd/s10053-021-00094-8
Regular Article - Molecular Physics and Chemical Physics
Photofragmentation and electron detachment of aromatic phosphonate, sulfonate and phosphate oxyanions
1
CNRS, Aix Marseille Univ., PIIM, Physique des Interactions Ioniques et Moléculaires, UMR 7345, 13397, Marseille, France
2
INQUIMAE (CONICET – Universidad de Buenos Aires), DQIAQF (Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria), 3er piso, Pab. II, 1428, Buenos Aires, Argentina
3
LIDYL, CEA, CNRS, Université Paris Saclay; CEA Saclay, Bât 522, 91191, Gif-sur-Yvette, France
Received:
1
December
2020
Accepted:
17
February
2021
Published online:
10
March
2021
The photodetachment energy threshold, as well as vibrationally resolved spectral signatures of the lower lying excited states and dipole bound states in model aromatic phosphonate, sulfonate and phosphate oxyanions, has been investigated using a photofragmentation spectrometer equipped with a cold ion trap. The effect of the laser excitation was monitored by mass-selective detection of product ion fragments or, alternatively, measuring the yield of the complementary neutral radicals discriminated according to their kinetic energy. The anions phenylphosphate, phenylsulfonate and p-toluenesulfonate evidenced the expected behavior, characterized by the predominance of ionic fragmentation processes, at low energies, rapidly evolving to a scenario controlled by the electron photodetachment channel at higher energies. Surprisingly for such a similar system, the phenylphosphonate anion does not have any ionic fragmentation channels and only exhibits the presence of dipole bound states.
Supplementary Information The online version supplementary material available at https://doi.org/10.1140/epjd/s10053-021-00094-8.
© The Author(s), under exclusive licence to EDP Sciences, SIF and Springer-Verlag GmbH Germany, part of Springer Nature 2021
