Key Laboratory of Materials Physics, Anhui Key Laboratory of Nanomaterials and Nanotechnology, CAS Center for Excellence in Nanoscience, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei, Anhui 230031, China.
Instrumental Analysis Center, Shanghai Jiaotong University, Shanghai 200240, China.
Nanoscale. 2017 Mar 17;9(11):3742-3746. doi: 10.1039/c6nr09724c.
Studying the kernel evolution pattern of gold nanoclusters is intriguing but challenging due to the difficulty of precise size control and structure resolution. Herein, we successfully synthesized two novel gold nanoclusters, Au(S-c-CH) and Au(S-c-CH) (S-c-CH: cyclohexanethiolate), and resolved their structures. Interestingly, it was found that the kernel evolves from Au(S-c-CH) to Au(S-c-CH) and Au(S-c-CH) in a novel fashion: alternate single-stranded evolution at both ends, which is remarkably different from the reported double-stranded growth at the bottom for the 4-tert-butylbenzenethiolate (TBBT)-protected nanocluster series. This work illustrates the variety of kernel evolution patterns and the directionality of the ligands with respect to the evolution of the kernel. In addition, differential pulse voltammetry (DPV) revealed that the electrochemical gap between the first oxidation and the first reduction potential decreases as the size increases from Au(S-c-CH) to Au(S-c-CH) and Au(S-c-CH).
研究金纳米簇的内核演变模式很有趣，但也极具挑战性，因为其精确的尺寸控制和结构解析存在困难。在此，我们成功合成了两种新型金纳米簇，Au(S-c-CH)和 Au(S-c-CH)（S-c-CH：环己硫醇盐），并解析了它们的结构。有趣的是，我们发现内核以一种新颖的方式从 Au(S-c-CH)演变到 Au(S-c-CH)和 Au(S-c-CH)：两端的单链交替演变，这与已报道的 4-叔丁基苯硫醇盐（TBBT）保护的纳米簇系列中底部的双链生长显著不同。这项工作说明了内核演变模式的多样性以及配体相对于内核演变的方向性。此外，差分脉冲伏安法（DPV）表明，随着从 Au(S-c-CH)到 Au(S-c-CH)和 Au(S-c-CH)的尺寸增加，第一个氧化和第一个还原电位之间的电化学间隙减小。
