Dynamics of proton migration and dissociation in core-excited ethyne probed by multiple ion momentum imaging.
J Chem Phys
; 131(24): 244305, 2009 Dec 28.
Article
em En
| MEDLINE
| ID: mdl-20059071
ABSTRACT
The study focuses on the rapid geometry change in ethyne excited near the carbon 1s edge. Core excitation and ionization lead to population of dicationic states in ethyne. We study three competing dissociation pathways associated with deprotonation in the linear ethyne molecule, and two cases of rapid proton migration. We investigate the alignment of the molecule in the excited state and find startling differences in these three cases. We present evidence for a strong anisotropy in the production of H(2)(+)/C(2)(+) fragments through a rapid deformation of the molecule to a dibridged conformation with the transition dipole moment parallel to the polarization of the exciting radiation.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Idioma:
En
Revista:
J Chem Phys
Ano de publicação:
2009
Tipo de documento:
Article
País de afiliação:
Suécia