Journal
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
Volume 9, Issue 17, Pages 4930-4934Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.jpclett.8b02211
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Funding
- Collaborative Research Program of the Institute for Chemical Research, Kyoto University
- Japan Society for the Promotion of Science (JSPS) KAKENHI [JP16H04099, 16K21402]
- Scientific Research on Innovative Areas, Coordination Asymmetry [17H05385]
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Techniques to control the chemical compositions and geometric structures of alloy clusters are indispensable to understand the correlation between the structures and physical/chemical properties of alloy clusters. In this study, we established a method to separate thiolate-protected 25-atom gold-silver alloy clusters (Au25-xAgx(SR)(18)) according to their chemical composition and structural isomer. Furthermore, using this method, we revealed that an isomeric distribution of the products exists in Au25-xAgx(SR)(18) (x >= 2) and that the distribution of these isomers depends on the synthesis method and standing time in solution. In this study, it was also demonstrated that the continuous discretization of the electronic structure is induced by the Ag substitution. This method can also be used to separate mixtures of [Au24M(SR)(18)](0) (M = Au, Pt, or Pd) and other Au-Ag alloy clusters ([Au36-xAgx(SR)(24)](0) and [Au38-xAgx(SR)(24)](0)). This method is expected to be used to obtain comprehensive knowledge of the structural property correlation of alloy clusters.
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