Stable Compositions and Structures of Copper Oxide Cluster Cations Cu O + (n = 2-8) Studied by Ion Mobility Mass
M Abdul Latif1, Jenna W J Wu1, Ryoichi Moriyama1
1Department of Chemistry, Graduate School of Science, Tohoku University, 6-3 Aoba, Aramaki, Aoba-ku, Sendai 980-8578, Japan.
Abstract:
Stable compositions and structures of copper oxide cluster cations have been studied by ion mobility mass spectrometry (IMMS) and density functional theory calculations. Cluster ions of the series Cu O + were predominantly observed with n:m ≈ 2:1 in the mass spectrum. Collision cross sections (CCSs) of the cluster ions with n:m ≈ 2:1, determined by IMMS, were found to increase monotonically with cluster size. In addition, the CCSs of Cu O + and Cu O + (n = 2-8) were examined, and stepwise increases were observed for Cu O + series. These cluster structures were assigned by comparison of the CCSs obtained via the IMMS experiment with theoretical orientation-averaged CCSs of optimized structures.
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