Guided ion beam studies of the reactions of Cr{sub n}{sup +} (n=2{endash}18) with O{sub 2}: Chromium cluster oxide and dioxide bond energies
- Department of Chemistry, University of Utah, Salt Lake City, Utah84112 (United States)
The kinetic energy dependence of the reactions of Cr{sub n}{sup +} (n=2{endash}18) with O{sub 2} are studied in a guided ion beam mass spectrometer. A variety of Cr{sub m}O{sub 2}{sup +}, Cr{sub m}O{sup +}, and Cr{sub m}{sup +} product ions, where m{le}n, are observed, with the dioxide cluster ions dominating the products for all larger reactant cluster ions. Reaction efficiencies are near unity for all but the smallest clusters. The energy dependence of the product cross sections is analyzed in several different ways to determine thermochemistry for both the first and second oxygen atom binding to chromium cluster ions. These values show little dependence on cluster size for clusters larger than three atoms. The trends in this thermochemistry are discussed and compared to bulk phase oxidation values. {copyright} {ital 1998 American Institute of Physics.}
- OSTI ID:
- 627750
- Journal Information:
- Journal of Chemical Physics, Vol. 108, Issue 19; Other Information: PBD: May 1998
- Country of Publication:
- United States
- Language:
- English
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