Reference : A photoionization mass spectrometric and threshold photoelectron-photoion coincidence...
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Chemistry
A photoionization mass spectrometric and threshold photoelectron-photoion coincidence study of vinylbromide (C2H3Br) in the vacuum ultraviolet range of 6-21 eV.
[en] Etude par photoionisation et par la coincidence photoelctron de seuil-photoion du bromure de vinyl (C2H3Br) dans le domaine de l'ultrviolet lointain de 6-21 eV.
Hoxha, A. [Fertilzers Europe, Brussels > > > >]
Yu, S.-Y. [Graduate University, Beiing, PR China > > > >]
Locht, Robert mailto [Université de Liège - ULiège > Département de Chimie (Sciences) > Laboratoire de Dynamique Moléculaire > >]
Jochims, H.-W. [Freie Universität Berlin > Institut für Physikalische und Theoretische Chemie > > >]
Leyh, Bernard mailto [Université de Liège - ULiège > Département de chimie (sciences) > Laboratoire de dynamique moléculaire >]
Chemical Physics
Elsevier Science
Yes (verified by ORBi)
The Netherlands
[en] Synchrotron radiation ; Photoionization mass spectrometry ; Threshold photoelectron-photoion coincidence ; ionization ; dissociation ; Ion-pair process ; autoionization ; breakdown diagram ; iosomerization ; C2H3Br
[en] The dissociative photoionization of vinyl bromide (C2H3Br) has been investigated by photoionization mass spectrometry (PIMS) and time-of-flight threshold photoelectron-photoion coincidence (TOF-TPEPICO) spectrometry using synchrotron radiation. The photoionization efficiency curves of the three most abundant ions, i.e. C2H3Br+, C2H3+ and C2H2+, are measured and analyzed in detail. A C2H3+/Br- photoion-pair formation process has been detected for the first time. Some arguments are provided in favor of the electronic excitation of the C2H3+ fragment and of the isomerization of the C2H2+ ions. The breakdown diagram for these ions in the 9.8–21 eV photon energy range, derived from TOF-TPEPICO mass
spectra, is discussed. The involvement of the successive C2H3Br+ ionic states and the role of autoionization of C2H3Br Rydberg states are emphasized. For the two minor HBr+ and Br+ fragment ions only the breakdown diagrams are measured and appearance energies are derived.
Laboratoire de Dynamique Moleculaire
Commission européenne : Direction générale de la Recherche
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