Controlling Gold Nanoclusters by Diphospine Ligands

被引：209

作者：

Chen, Jing ^{[1
]}

Zhang, Qian-Fan ^{[1
]}

Bonaccorso, Timary A. ^{[1
]}

Williard, Paul G. ^{[1
]}

Wang, Lai-Sheng ^{[1
]}

机构：

[1] Brown Univ, Dept Chem, Providence, RI 02912 USA

来源：

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 2014年 / 136卷 / 01期

基金：

美国国家科学基金会;

关键词：

THIOLATE-PROTECTED AU-38; NUMBER AU-13 CLUSTERS; X-RAY STRUCTURE; OPTICAL-PROPERTIES; CRYSTAL-STRUCTURE; ELECTRONIC-PROPERTIES; SUPERATOM COMPLEXES; NANOPARTICLES; AU-20; SIZE;

D O I：

10.1021/ja411061e

中图分类号：

O6 [化学];

学科分类号：

070301 [无机化学];

摘要：

We report the synthesis and structure determination of a new Au-22 nanocluster coordinated by six bidentate diphosphine ligands: 1,8-bis(diphenylphosphino) octane (L-8 for short). Single crystal X-ray crystallography and electrospray ionization mass spectrometry show that the cluster assembly is neutral and can be formulated as Au-22(L-8)(6). The Au-22 core consists of two Au-11 units clipped together by four L-8 ligands, while the additional two ligands coordinate to each Au-11 unit in a bidentate fashion. Eight gold atoms at the interface of the two Au-11 units are not coordinated by any ligands. Four short gold-gold distances (2.64-2.65 angstrom) are observed at the interface of the two Au-11 clusters as a result of the clamping force of the four clipping ligands and strong electronic interactions. The eight uncoordinated surface gold atoms in the Au-22(L-8)(6) nanocluster are unprecedented in atom-precise gold nanoparticles and can be considered as potential in situ active sites for catalysis.

引用

页码：92 / 95

页数：4

共 43 条

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STEM Electron Diffraction and High-Resolution Images Used in the Determination of the Crystal Structure of the Au144(SR)60 Cluster [J].