Au57Ag53(C≡CPh)40Br12: A Large Nanocluster with C1 Symmetry |
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| Authors: | Zong‐Jie Guan Jiu‐Lian Zeng Shang‐Fu Yuan Feng Hu Dr Yu‐Mei Lin Prof Quan‐Ming Wang |
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| 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 |
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| 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. |
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| Keywords: | alkynyl ligands cluster compounds gold optical properties silver |
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