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Tri-icosahedral Gold Nanocluster [Au37(PPh3)10(SC2H4Ph)10X2]+: Linear Assembly of Icosahedral Building Blocks
ACS Nano ( IF 15.8 ) Pub Date : 2015-07-27 00:00:00 , DOI: 10.1021/acsnano.5b03524
Renxi Jin 1, 2 , Chong Liu 3 , Shuo Zhao 1 , Anindita Das 1 , Hongzhu Xing 2 , Chakicherla Gayathri 1 , Yan Xing 2 , Nathaniel L. Rosi 3 , Roberto R. Gil 1 , Rongchao Jin 1
Affiliation  

The [Au37(PPh3)10(SR)10X2]+ 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 [Au37(PPh3)10(SC2H4Ph)10X2]+ (counterion: Cl or Br) with its crystal structure characterized by X-ray crystallography. This nanocluster shows a rod-like structure assembled from three icosahedral Au13 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 clusters). Some interesting trends are identified in the evolution from the monoicosahedral [Au13(PPh3)10X2]3+ to the bi-icosahedral [Au25(PPh3)10(SC2H4Ph)5X2]2+ and to the tri-icosahedral [Au37(PPh3)10(SC2H4Ph)10X2]+ nanocluster, which also points to the possibility of achieving even longer rod nanoclusters based upon assembly of icosahedral building blocks.

中文翻译:

三二十面体金纳米簇[Au 37(PPh 310(SC 2 H 4 Ph)10 X 2 ] +:二十面体构建基块的线性组装

[Au 37(PPh 310(SR)10 X 2 ] +纳米团簇(其中SR =硫醇盐,X = Cl / Br)在2007年得到理论预测,但是从那时以来,合成和化学方面一直没有实验成功。结构确定。在本文中,我们报道[Au的动力学控制,选择性合成37(PPH 310(SC 2 ħ 4 PH)10 X 2 ] +(抗衡离子值:Cl -或Br -),其晶体结构由X射线晶体学表征。该纳米团簇显示了由三个二十面体Au 13单元以线性方式组装而成的棒状结构,与早期的预测一致。研究了光吸收以及电化学和催化性能。这种新的纳米团簇的合成成功,使我们能够深入了解的规模,结构和性质的金纳米簇的进化将是基于二十面体单元(装配,即集群的集群)。从单二十面体[Au 13(PPh 310 X 2 ] 3+的演化中发现了一些有趣的趋势双二十面体[Au 25(PPh 310(SC 2 H 4 Ph)5 X 2 ] 2+和三二十面体[Au 37(PPh 310(SC 2 H 4 Ph)10 X 2 ] +纳米团簇,这也指出了基于二十面体构建基块的组装,可以获得更长的棒状纳米团簇的可能性。
更新日期:2015-07-27
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