Gas-Phase Reaction of CeV2O7+ with C2H4 : Activation of C-C and C-H Bonds

The reactivity of metal oxide clusters toward hydrocarbon molecules can be changed, tuned, or controlled by doping. Cerium-doped vanadium cluster cations CeV2O7+ are generated by laser ablation, mass-selected by a quadrupole mass filter, and then reacted with C2H4 in a linear ion trap reactor. The reaction is characterized by a reflectron time-of-flight mass spectrometer. Three types of reaction channels are observed: 1) single oxygen-atom transfer, 2) double oxygen-atom transfer, and 3) C=C bond cleavage. This study provides the first bimetallic oxide cluster ion, CeV2O7+, which gives rise to C=C bond cleavage of ethene. Neither CexOy +/- nor VxOy +/- alone possess the necessary topological and electronic properties to bring about such a reaction.