硫醇盐保护的Au24纳米团簇的晶体结构和电子性质
Crystal structure and electronic properties of a thiolate-protected Au24 nanocluster.
作者信息
Das Anindita, Li Tao, Li Gao, Nobusada Katsuyuki, Zeng Chenjie, Rosi Nathaniel L, Jin Rongchao
机构信息
Department of Chemistry, Carnegie Mellon University, Pittsburgh, PA 15213, USA.
出版信息
Nanoscale. 2014 Jun 21;6(12):6458-62. doi: 10.1039/c4nr01350f.
Solving the total structures of gold nanoclusters is of critical importance for understanding their electronic, optical and catalytic properties. Herein, we report the X-ray structure of a charge-neutral Au24(SCH2Ph-(t)Bu)20 nanocluster. This structure features a bi-tetrahedral Au8 kernel protected by four tetrameric staple-like motifs. Electronic structure analysis is further carried out and the optical absorption spectrum is interpreted. The Au24(SCH2Ph-(t)Bu)20, Au23(S-c-C6H11)16 and Au25(SCH2CH2Ph)18 nanoclusters constitute the first crystallographically characterized "trio".
解析金纳米团簇的整体结构对于理解其电子、光学和催化性质至关重要。在此，我们报道了电荷中性的Au24(SCH2Ph-(t)Bu)20纳米团簇的X射线结构。该结构的特征是一个双四面体Au8核，由四个四聚体钉状基序保护。进一步进行了电子结构分析并解释了光吸收光谱。Au24(SCH2Ph-(t)Bu)20、Au23(S-c-C6H11)16和Au25(SCH2CH2Ph)18纳米团簇构成了第一个晶体学表征的“三重奏”。
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