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Photogeneration of ions via delocalized charge transfer states. I. XezH+ and XePD+ in solid Xe
 

Summary: Photogeneration of ions via delocalized charge transfer states. I. XezH+
and XePD+ in solid Xe
H. Kunttu, J. Seetula, and M. RUben
Department of Physical Chemistry, University of Helsinki, SF-001 70 Helsinki, Finland
V. A. Apkarian
Institute for Surface and Interface Science, Department of Chemistry, University of California, Irvine,
California 92 717 USA
(Received 19 November 1991; accepted 8 January 1992)
Delocalized charge-transfer excitations in solid xenon multiply doped with atomic halogens (I,
Br, Cl) and hydrogen are demonstrated to lead to charge separation by trapping of the positive
charge. As evidence of such a concept we present the first vibrational spectra of Xe,H+ and
Xe,D +, which are believed to be vibrationally bound ions.
I. INTRODUCTION
In a seriesof detailed investigations Fajardo and Apkar-
ian demonstrated that optically accessed charge-transfer
states of solid xenon doped with atomic halogens (I,Br,Cl)
are extensively delocalized: an electron of infinite effective
mass localized on the halogen atom, and a delocalized hole
in the valence band of the extended solid bound to the nega-
tive center. 1-3The binding is essentially understood in terms

  

Source: Apkarian, V. Ara - Department of Chemistry, University of California, Irvine

 

Collections: Chemistry