期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 60, 期 12, 页码 6699-6703出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.202014154
关键词
alkynes; chloride; cluster compounds; gold; silica gel column chromatography
资金
- National Natural Science Foundation of China [91961201, 21973116, 21631007]
The article describes the synthesis and isolation of alkynyl/chloride-protected gold nanoclusters, and presents the structures of three different clusters, including the new clusters Au-67 and Au-106 with complex surface structures and unique electrochemical properties.
The synthesis and isolation of alkynyl/chloride-protected gold nanoclusters is described. Silica gel column chromatography is effective in isolating gold nanoclusters from the as-synthesized cluster mixture to give the clusters Na[Au25L18] (Au-25), [HNEt3](3)[Au67L32Cl4] (Au-67), [HNEt3](4)[Au106L40Cl12] (Au-106), L=3,5-bis(trifluoromethyl)-phenylacetylide. Au-67 and Au-106 are new clusters; the structures were determined by X-ray single-crystal diffraction. Au-67 contains a distorted Au-18 Marks decahedron shelled by an irregular Au-32 and further protected with two V-shaped Au2L3, 13 linear AuL2 staples and 4 chlorides. Au-67 is the first structurally determined 34e superatomic gold nanocluster. Au-106 is composed of 106 Au atoms co-protected by alkynyls and chlorides. It has a Au-79 kernel, like in Au-102(p-MBA)(44). The surface structure of Au-106 includes 20 linear Au-alkynyl staples, 5 Cl-Au-Cl and 2 Cl-Au motifs. These three gold nanoclusters show size-dependent electrochemical properties.
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