ORBi: Hoxha A. - A photoionization mass spectrometric and threshold photoelectron-photoion coincidence study of vinylbromide (C2H3Br) in the vacuum ultraviolet range of 6-21 eV.

Reference : A photoionization mass spectrometric and threshold photoelectron-photoion coincidence st...


	Document type :	Scientific journals : Article
	Discipline(s) :	Physical, chemical, mathematical & earth Sciences : Chemistry
	To cite this reference:	http://hdl.handle.net/2268/84193

Title :	A photoionization mass spectrometric and threshold photoelectron-photoion coincidence study of vinylbromide (C2H3Br) in the vacuum ultraviolet range of 6-21 eV.
Language :	English
Alternative title :	[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.
Author, co-author :	Hoxha, A. [Fertilzers Europe, Brussels > > > >]
	Yu, S.-Y. [Graduate University, Beiing, PR China > > > >]
	Locht, Robert [Université de Liège - ULg > Département de Chimie (Sciences) > Laboratoire de Dynamique Moléculaire > >]
	Jochims, H.-W. [Freie Universität Berlin > Institut für Physikalische und Theoretische Chemie > > >]
	Leyh, Bernard [Université de Liège - ULg > Département de chimie (sciences) > Laboratoire de dynamique moléculaire >]
Publication date :	2011
Journal title :	Chemical Physics
Publisher :	Elsevier Science
Volume :	379
Issue/season :	1-3
Pages :	99-108
Peer reviewed :	Yes (verified by ORBi)
Audience :	International
ISSN :	0301-0104
City :	Amsterdam
Country :	The Netherlands
Keywords :	[en] Synchrotron radiation ; Photoionization mass spectrometry ; Threshold photoelectron-photoion coincidence ; ionization ; dissociation ; Ion-pair process ; autoionization ; breakdown diagram ; iosomerization ; C2H3Br
Abstract :	[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.
Research units :	Laboratoire de Dynamique Moleculaire
Funders :	Commission européenne : Direction générale de la Recherche
Name of the research project :	Contrat
Target :	Researchers
Permalink :	http://hdl.handle.net/2268/84193
DOI :	10.1016/j.chemphys.2010.11.011
Commentary :	- PDF-version of Editor's Postprint available on request - Version-pdf du tiré-à-part disponible sur demande

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Open access	CP379(2011)99(ppau).pdf		Author postprint	1.42 MB	View/Open

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