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Spectroscopy Letters
An International Journal for Rapid Communication
Volume 27, 1994 - Issue 1
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Original Articles

Formation of an Oxy-Chloride Overlayer at a Bi(0001) Surface

B. Afsin Chemistry Department, Faculty of Arts and Sciences, Ondokuz Mayis University, 55139, Samsun, Turkey
&
M. W. Roberts School of Chemistry and Applied Chemistry, University of Wales, P.O. Box 912, Cardiff, CF1 3TB, U.K.
Pages 139-146 | Received 01 Feb 1993, Accepted 27 Aug 1993, Published online: 21 Aug 2006
 
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Abstract

A facile oxygen-induced chemisorptive replacement reaction occurs when a Bi(0001)-O overlayer is exposed to hydrogen chloride at 298K. The overlayer, which conforms to the stoichiometry BiOCl2, is stable in contrast to analogous chemistry observed earlier with a Pb(110) surface. Evidence for discrete localized states associated with Bi2+ or Bi3+ species is observed from shifts in the Bi(4f) binding energies while the charge distribution within the bismuth-chlorine bond is shown to be sensitive to the presence of oxygen adatoms within the oxy-chloride overlayer.

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