Au57Ag53(C≡CPh)40Br12: A Large Nanocluster with C1 Symmetry

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 k...

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Bibliographic Details
Published in:Angewandte Chemie International Edition 2018-05, Vol.57 (20), p.5703-5707
Main Authors: Guan, Zong‐Jie, Zeng, Jiu‐Lian, Yuan, Shang‐Fu, Hu, Feng, Lin, Yu‐Mei, Wang, Quan‐Ming
Format: Article
Language:English
Subjects:
alkynyl ligands
Atomic structure
Bimetals
cluster compounds
Gold
Metals
Nanoclusters
optical properties
Silver
Symmetry
Thermal stability
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Summary: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. A very stable nanocluster, Au57Ag53(C≡CPh)40Br12, has been synthesized that has an asymmetric structure with C1 symmetry. This nanocluster exhibits excellent thermal stability and is robust under oxidative or basic conditions. The Ag precursor is critical in determining the final structure, which suggests a directing role of counterions.
ISSN:1433-7851
1521-3773
DOI:10.1002/anie.201801261