期刊
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
卷 141, 期 21, 页码 8422-8425出版社
AMER CHEMICAL SOC
DOI: 10.1021/jacs.9b03257
关键词
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资金
- Research Center Program of the IBS in Korea [IBS-R006-D1]
- Academy of Finland [294217, 319208]
- National Key R&D Program of China [2017YFA02 073 02]
- National Natural Science Foundation of China [21890752, 21731005, 21420102001]
While there are numerous recent reports on doping of a ligand-protected noble metal nanocluster (e.g., Au and Ag) with another noble metal, non-noble metal (e.g., Cd) doping remains challenging. Here, we design a phosphine-assisted synthetic strategy and synthesize a Cd doped Ag nanocluster, Cd12Ag32(SePh)(36) (SePh: selenophenolate), which exhibits characteristic UV-vis absorption features and rare near-infrared (NIR) photoluminescence at similar to 1020 nm. The X-ray single crystal structure reveals an asymmetric two-shell Ag-4@Ag-24 metal kernel protected by four nonplanar Cd3Ag(SePh)(9) metal-ligand frameworks. Furthermore, the electronic structure analysis shows that the cluster is a 20-electron superatom and density functional theory predicts that its chiral optical response is comparable to the well-known Au-38(SR)(24) cluster. Our synthetic approach will pave a new path for introducing other non-noble metals into noble metal nanoclusters for exploring their effect on optical and chemical properties.
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