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Photoionization of 2-pyridone and 2-hydroxypyridine

Abstract : We studied the photoionization of 2-pyridone and its tautomer, 2-hydroxypyridine by means of VUV synchrotron radiation coupled to a velocity map imaging electron/ion coincidence spectrometer. The photoionization efficiency (PIE) spectrum is composed of steps. The state energies of the [2-pyridone]+ cation in the ground and à excited electronic states, as well as of the [2-hydroxypyridine]+ cation in the electronic ground state, are determined. The slow photoelectron spectra (SPES) are dominated by the 000 transitions to the corresponding electronic states together with several weaker bands corresponding to the population of the pure or combination vibrational bands of the cations. These vibrationally-resolved spectra compare very well with state-of-the-art calculations. Close to the ionization thresholds, the photoionization of these molecules is found to be mainly dominated by a direct process whereas the indirect route (autoionization) may contribute at higher energies.
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Contributor : Caroline Lebe Connect in order to contact the contributor
Submitted on : Monday, July 5, 2010 - 2:44:45 PM
Last modification on : Friday, January 21, 2022 - 3:33:56 AM

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J. C. Poully, J. P. Schermann, N. Nieuwjaer, F. Lecomte, G. Grégoire, et al.. Photoionization of 2-pyridone and 2-hydroxypyridine. Physical Chemistry Chemical Physics, Royal Society of Chemistry, 2010, 12 (14), pp.3566-3572. ⟨10.1039/b923630a⟩. ⟨hal-00497637⟩



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