Structural isomerism in gold nanoparticles revealed by X-ray crystallography

Shubo Tian, Yi-Zhi Li, Man-Bo Li, Jinyun Yuan, Jinlong Yang, Zhikun Wu () and Rongchao Jin ()
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Shubo Tian: Key Laboratory of Materials Physics, Anhui Key Laboratory of Nanomaterials and Nanotechnology, Institute of Solid State Physics, Chinese Academy of Sciences
Yi-Zhi Li: State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Nanjing University
Man-Bo Li: Key Laboratory of Materials Physics, Anhui Key Laboratory of Nanomaterials and Nanotechnology, Institute of Solid State Physics, Chinese Academy of Sciences
Jinyun Yuan: Hefei National Laboratory for Physical Sciences at the Microscale and Synergetic Innovation Center of Quantum Information and Quantum Physics, University of Science and Technology of China
Jinlong Yang: Hefei National Laboratory for Physical Sciences at the Microscale and Synergetic Innovation Center of Quantum Information and Quantum Physics, University of Science and Technology of China
Zhikun Wu: Key Laboratory of Materials Physics, Anhui Key Laboratory of Nanomaterials and Nanotechnology, Institute of Solid State Physics, Chinese Academy of Sciences
Rongchao Jin: Carnegie Mellon University

Nature Communications, 2015, vol. 6, issue 1, 1-7

Abstract: Abstract Revealing structural isomerism in nanoparticles using single-crystal X-ray crystallography remains a largely unresolved task, although it has been theoretically predicted with some experimental clues. Here we report a pair of structural isomers, Au38T and Au38Q, as evidenced using electrospray ionization mass spectrometry, X-ray photoelectron spectroscopy, thermogravimetric analysis and indisputable single-crystal X-ray crystallography. The two isomers show different optical and catalytic properties, and differences in stability. In addition, the less stable Au38T can be irreversibly transformed to the more stable Au38Q at 50 °C in toluene. This work may represent an important advance in revealing structural isomerism at the nanoscale.

Date: 2015
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DOI: 10.1038/ncomms9667

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