Chloride-Promoted Formation of a Bimetallic Nanocluster Au80Ag30 and the Total Structure Determination

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• 作者：Jiu-Lian Zeng ; Zong-Jie Guan ; Yang Du ; Zi-Ang Nan ; Yu-Mei Lin ; Quan-Ming Wang
• 刊名：Journal of the American Chemical Society
• 出版年：2016
• 出版时间：June 29, 2016
• 年：2016
• 卷：138
• 期：25
• 页码：7848-7851
• 全文大小：349K
• 年卷期：0
• ISSN：1520-5126

文摘

We report the total structure determination of a large bimetallic nanocluster with an overall composition of [Au₈₀Ag₃₀(C≡CPh)₄₂Cl₉]Cl. It is the largest structurally characterized bimetallic coinage nanocluster so far. The 110 metal atoms are distributed in a concentric four-shell Russian doll arrangement, Au₆@Au₃₅@Ag₃₀Au₁₈@Au₂₁. There are 42 PhC≡C— ligands and 9 μ₂-chloride ligands clamping on the cluster surface. The chloride is proven to be critical for the formation of this giant cluster, as the control experiment in the absence of halide gives only smaller species. This work demonstrates that the halide can play a key role in the formation of a large metal nanocluster, and the halide effect should be considered in the design and synthesis of metal nanoclusters.