Methane activation by platinum cluster ions in the gas phase: Effects of cluster charge on the Pt4 tetramer

Uwe Achatz, Christian Berg, Stefan Joos, Brigitte S. Fox, Martin K. Beyer, Gereon Niedner-Schatteburg, Vladimir E. Bondybey

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121 Scopus citations

Abstract

The reactions of cationic and anionic platinum clusters Pt±n, n=1-9, with methane CH4 are investigated under single collision conditions in a Fourier-Transform Ion Cyclotron Resonance Mass Spectrometer. The reaction of the platinum clusters proceeds through the activation of C-H bonds of methane and leads to the subsequent elimination of molecular hydrogen H2 to form the final metal-carbene complex Pt±nCH2. The cation cluster reactions proceed in general with collision rate whereas the anion cluster reactions are more than an order of magnitude slower. The platinum tetramer anion is unique among all the clusters studied, reacting more efficiently than the corresponding cation. Tentative interpretation in terms of electronic and geometric effects is performed.

Original languageEnglish
Pages (from-to)53-58
Number of pages6
JournalChemical Physics Letters
Volume320
Issue number1-2
DOIs
StatePublished - 31 Mar 2000

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