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Joint experimental and theoretical investigations of the reactivity of Au2On- and Au3On- (n=1–5) with carbon monoxide.

Authors :
Kimble, Michele L.
Moore, Nelly A.
Johnson, Grant E.
Castleman, Jr., A. W.
Bürgel, Christian
Mitric, Roland
Bonacˇic-Koutecký, Vlasta
Source :
Journal of Chemical Physics. 11/28/2006, Vol. 125 Issue 20, p204311. 14p. 10 Diagrams, 1 Chart, 6 Graphs.
Publication Year :
2006

Abstract

The interactions between small gold oxide cluster anions, Au2,3On- (n=1–5), and CO were investigated in a fast-flow reactor mass spectrometer, and experimental results were verified with a guided ion beam mass spectrometer. Density functional calculations along with molecular dynamics simulations were also utilized to explain the experimental findings. From these studies, we show that, for the interactions between AumOn- and CO, each atom counts. With the addition of a single gold atom, it is observed that association of CO and replacement of O2 by CO become the dominant reaction channels as opposed to CO oxidation. We also present results that show that the oxidation of CO takes place only in the presence of a peripheral oxygen atom. However, this condition is not always sufficient. Furthermore, the association of CO onto AumOn- follows a general qualitative rule based on the relationship between the energy of the cluster lowest unoccupied molecular orbital and the binding energy of CO. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
00219606
Volume :
125
Issue :
20
Database :
Academic Search Index
Journal :
Journal of Chemical Physics
Publication Type :
Academic Journal
Accession number :
23356619
Full Text :
https://doi.org/10.1063/1.2371002