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Issue 14, 2010
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Photoionization of 2-pyridone and 2-hydroxypyridine

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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 [X with combining tilde] 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.

Graphical abstract: Photoionization of 2-pyridone and 2-hydroxypyridine

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Publication details

The article was received on 10 Nov 2009, accepted on 17 Feb 2010 and first published on 02 Mar 2010

Article type: Paper
DOI: 10.1039/B923630A
Citation: Phys. Chem. Chem. Phys., 2010,12, 3566-3572
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    Photoionization of 2-pyridone and 2-hydroxypyridine

    J. C. Poully, J. P. Schermann, N. Nieuwjaer, F. Lecomte, G. Grégoire, C. Desfrançois, G. A. Garcia, L. Nahon, D. Nandi, L. Poisson and M. Hochlaf, Phys. Chem. Chem. Phys., 2010, 12, 3566
    DOI: 10.1039/B923630A

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