Issue 15, 2009
From the journal:

Physical Chemistry Chemical Physics

Au10−: isomerism and structure-dependent O2 reactivity

Wei Huangab  and  Lai-Sheng Wang*ab  

* Corresponding authors

a Department of Physics, Washington State University, 2710 University Drive, Richland, Washington, USA

b Chemical & Materials Sciences Division, Pacific Northwest National Laboratory, MS K8-88, PO Box 999, Richland, Washington, USA
E-mail: ls.wang@pnl.gov

Abstract

Structure isomers of the Au10− cluster and their chemical reactivity with O2 are studied using photoelectron spectroscopy under different experimental conditions. In addition to the global minimum triangular D3h structure, at least three low-lying isomers (X′, X″, and X‴) are observed distinctly using argon tagging and O2 titration. The D3h structure has a very high electron affinity of 3.88 eV, whereas the low-lying isomers have lower electron affinities (2.86, 3.09, and 3.45 eV for X′, X″, and X‴, respectively). It is found that the D3h global minimum does not react with O2 and can only form a physisorbed Au10(O2)− van der Waals complex under cold experimental conditions. The three low-lying isomers are reactive with O2 and can be systematically titrated out of the cluster beam using an O2-seeded carrier gas, leaving a clean D3h Au10− beam.

Graphical abstract: Au10−: isomerism and structure-dependent O2 reactivity

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Article information

DOI
https://doi.org/10.1039/B823159A
Article type
Paper
Submitted
05 Jan 2009
Accepted
02 Feb 2009
First published
26 Feb 2009

Phys. Chem. Chem. Phys., 2009,11, 2663-2667

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Au10−: isomerism and structure-dependent O2 reactivity

W. Huang and L. Wang, Phys. Chem. Chem. Phys., 2009, 11, 2663 DOI: 10.1039/B823159A

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