氯离子促进形成双金属纳米团簇 Au80Ag30 和全结构测定。
Chloride-Promoted Formation of a Bimetallic Nanocluster Au80Ag30 and the Total Structure Determination.
机构信息
Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University , Xiamen, 361005, PR China.
Department of Chemistry, Tsinghua University , Beijing, 100084, PR China.
出版信息
J Am Chem Soc. 2016 Jun 29;138(25):7848-51. doi: 10.1021/jacs.6b04471. Epub 2016 Jun 15.
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.
我们报告了一个具有整体组成[Au80Ag30(C≡CPh)42Cl9]Cl 的大型双金属纳米团簇的总结构确定。这是迄今为止结构特征最大的双金属铸币纳米团簇。110 个金属原子分布在同心的四层俄罗斯娃娃排列中，Au6@Au35@Ag30Au18@Au21。有 42 个 PhC≡C-配体和 9 个 μ2-氯配体夹在团簇表面。证明氯离子对于这种巨型团簇的形成至关重要，因为在没有卤化物的对照实验中只得到较小的物种。这项工作表明，卤化物可以在形成大金属纳米团簇中发挥关键作用，在设计和合成金属纳米团簇时应考虑卤化物效应。
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