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Au57Ag53(C≡CPh)40Br12: A Large Nanocluster with C1 Symmetry
Authors:Zong‐Jie Guan  Jiu‐Lian Zeng  Shang‐Fu Yuan  Feng Hu  Dr. Yu‐Mei Lin  Prof. Quan‐Ming Wang
Affiliation:1. Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, P. R. China;2. Department of Chemistry, Tsinghua University, Beijing, P. R. China
Abstract:The controlled synthesis and structure determination of a bimetallic nanocluster Au57Ag53(C≡CPh)40Br12 (Au57Ag53) is presented. The metal core has a four‐shell Au2M3@Au34@Ag51 @Au20 (M=1/3 Au+2/3 Ag) architecture. In contrast to the previously reported large nanoclusters that have highly symmetric kernel structures, the metal atoms in Au57Ag53 are arranged in an irregular manner with C1 symmetry. This cluster exhibits excellent thermal stability and is robust under oxidative or basic conditions. The silver precursors play a key role in dictating the structures of the nanoclusters, which suggests the importance of the counteranions used.
Keywords:alkynyl ligands  cluster compounds  gold  optical properties  silver
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