Photofragmentation and electron detachment of aromatic phosphonate, sulfonate and phosphate oxyanions

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 i...

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Bibliographic Details
Published in:The European physical journal. D, Atomic, molecular, and optical physics Atomic, molecular, and optical physics, 2021-03, Vol.75 (3), Article 95
Main Authors: Noble, Jennifer A., Marceca, Ernesto, Dedonder, Claude, Carvin, Isaure, Gloaguen, Eric, Jouvet, Christophe
Format: Article
Language:English
Subjects:
Anions
Applications of Nonlinear Dynamics and Chaos Theory
Atomic
Chemical Physics
Cold traps
Dipoles
Fragmentation
Ions
Kinetic energy
Molecular
Optical and Plasma Physics
Phenyl phosphonate
Phosphonates
Photodetachment
Physical Chemistry
Physics
Physics and Astronomy
Quantum Information Technology
Quantum Physics
Regular Article - Molecular Physics and Chemical Physics
Spectral signatures
Spectroscopy of biomolecular ions in vacuo
Spectroscopy/Spectrometry
Spintronics
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Summary: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. Graphic abstract
ISSN:1434-6060
1434-6079
DOI:10.1140/epjd/s10053-021-00094-8