期刊
ACS NANO
卷 9, 期 8, 页码 8530-8536出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsnano.5b03524
关键词
Au-37 nanocluster; mixed ligands; clusters of clusters; structure evolution; CO oxidation
类别
资金
- China Scholarship Council
- Air Force Office of Scientific Research under AFOSR [FA9550-15-1-9999 (FA9550-15-1-0154)]
The [Au-37(PPh3)(10)(SR)(10)X-2](+) nanocluster (where SR = thiolate and X = Cl/Br) was theoretically predicted in 2007, but since then, there has been no experimental success in the synthesis and structure determination. Herein, we report a kinetically controlled, selective synthesis of [Au-37(PPh3)(10)(SC2H4Ph)(10)X-2](+) (counterion: Cl- or Br-) with its crystal structure characterized by X-ray crystallography. This nanocluster shows a rod-like structure assembled from three icosahedral Au-13 units in a linear fashion, consistent with the earlier prediction. The optical absorption and the electrochemical and catalytic properties are investigated. The successful synthesis of this new nanocluster allows us to gain insight into the size, structure, and property evolution of gold nanoclusters that are based upon the assembly of icosahedral units (i.e., cluster of dusters). Some interesting trends are identified in the evolution from the monoicosahedral [Au-13(PPh3)(10)X-2](3+) to the bi-icosahedral [Au-25(PPh3)(10)(SC2H4Ph)(5)X-2](2+) and to the tri-icosahedral [Au-37(PPh3)(10)(SC2H4Ph)(10)X-2](+) nanocluster, which also points to the possibility of achieving even longer rod nanoclusters based upon assembly of icosahedral building blocks.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据