Alkynyl-Protected Au23 Nanocluster: A 12-Electron System

被引：106

作者：

Wan, Xian-Kai ^{[1
]}

Yuan, Shang-Fu ^{[1
]}

Tang, Qing ^{[2
]}

Jiang, De-en ^{[2
]}

Wang, Quan-Ming ^{[1
]}

机构：

[1] Xiamen Univ, Coll Chem & Chem Engn, Collaborat Innovat Ctr Chem Energy Mat iChEM, State Key Lab Phys Chem Solid Surfaces,Dept Chem, Xiamen 361005, Peoples R China

[2] Univ Calif Riverside, Dept Chem, Riverside, CA 92521 USA

来源：

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION | 2015年 / 54卷 / 20期

关键词：

alkyne ligands; cluster compounds; gold; nanoclusters; phosphines; CRYSTAL-STRUCTURE; GOLD NANOPARTICLE; CLUSTERS; CATALYSIS; MOTIF; SIZE;

D O I：

10.1002/anie.201500590

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

A 23-gold-atom nanocluster was prepared by NaBH4-mediated reduction of a solution of PhC equivalent to CAu and Ph3PAuSbF6 in CH2Cl2. The cluster composition was determined to be [Au-23(PhC equivalent to C)(9)(Ph3P)(6)](2+) and single-crystal X-ray diffraction revealed that the cluster has an unprecedented Au-17 kernel protected by three PhC2-Au-C-2(Ph)-Au-C2Ph motifs and six Ph3P groups. The Au-17 core can be viewed as the fusion of two Au-10 units sharing a Au-3 triangle. Electronic structure analysis from DFT calculations suggests that the stability of this unusual 12-electron cluster is a result of the splitting of the superatomic 1D orbitals under D-3h symmetry of the Au-17 kernel. The discovery and determination of the structure of the Au-23 cluster demonstrates the versatility of the alkynyl ligand in leading to the formation of new cluster compounds.

引用

页码：5977 / 5980

页数：4

共 33 条

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