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Updated: Nov 25, 2025
A Simple Method for the Size Controlled Synthesis of Stable Oligomeric Clusters of Gold Nanoparticles under Ambient Conditions
Published on: February 5, 2016
Enriching Structural Diversity of Alkynyl-Protected Gold Nanoclusters with Chlorides
Jiao-Jiao Li1, Zong-Jie Guan1, Shang-Fu Yuan1
1Department of Chemistry, Key Laboratory of Organic Optoelectronics and Molecular Engineering of the Ministry of Education, Tsinghua University, Beijing, 100084, P. R. China.
Abstract:
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[Au25 L18 ] (Au25 ), [HNEt3 ]3 [Au67 L32 Cl4 ] (Au67 ), [HNEt3 ]4 [Au106 L40 Cl12 ] (Au106 ), L=3,5-bis(trifluoromethyl)-phenylacetylide. Au67 and Au106 are new clusters; the structures were determined by X-ray single-crystal diffraction. Au67 contains a distorted Au18 Marks decahedron shelled by an irregular Au32 and further protected with two V-shaped Au2 L3 , 13 linear AuL2 staples and 4 chlorides. Au67 is the first structurally determined 34e superatomic gold nanocluster. Au106 is composed of 106 Au atoms co-protected by alkynyls and chlorides. It has a Au79 kernel, like in Au102 (p-MBA)44 . The surface structure of Au106 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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