Abstract
Mixed bismuth–molybdenum oxide clusters containing one or two molybdenum atoms have been produced in a molecular beam. Their compositions can be formulated in terms of (Bi 2O 3) m BiOMoO 3 +, ( Bi 2 O 3) m BiO( MoO 3) 2 + (m⩾2) , (Bi 2O 3) m O n MoO 3 +, and ( Bi 2 O 3) m O n( MoO 3) 2 + (m⩾3, n=0,1) . Reactivities of these molybdenum-doped and pure bismuth oxide cluster cations towards ethene have been investigated and rate constants have been calculated, e.g., for Bi 6O 9 + and Bi 6O 9MoO 3 +. Remarkably, the reactivity of the highly active bismuth oxide cluster Bi 6O 9 + is only slightly varied by addition of one {MoO 3} unit, providing evidence for the independence of the different metal oxide centres in the cluster.
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