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Oxidation processes of chromium cluster cations, Cr 2 + and Cr 3 + , are investigated by kinetics measurements under multiple-collision conditions by using a temperature-controlled ion trap. Both of the reactants commonly generate Cr+ and CrO+ as final products. However, the major reaction pathway to CrO+ presents a sharp contrast; Cr 2 + produces it directly by a single O2 collision, whereas Cr 3 + does via an intermediate Cr2O+. Comparison of the kinetics of the intermediate with that of cold Cr2O+ generated in the cluster source reveals that the intermediate Cr2O+ is thermalized promptly with the buffer gas filling the trap.
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| Authors: | Tomonori Ito, Kazuhiro Egashira, Koichi Tsukiyama, Akira Terasaki | |
| Journal: | Chemical Physics Letters | |
| Year: | 2012 | |
| DOI: | 10.1016/j.cplett.2012.04.040 | |
| Publication date: | 28-05-2012 |
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