Cao Yaoyao, Xu Ying, Shen Honglei, Pan Peiyao, Zou Xuejuan, Kang Xi, Zhu Manzhou
Department of Chemistry and Centre for Atomic Engineering of Advanced Materials, Key Laboratory of Structure and Functional Regulation of Hybrid Materials of Ministry of Education, Institutes of Physical Science and Information Technology and Anhui Province Key Laboratory of Chemistry for Inorganic/Organic Hybrid Functionalized Materials, Anhui University, Hefei, Anhui 230601, China.
Nanoscale. 2023 Aug 25;15(33):13784-13789. doi: 10.1039/d3nr03288d.
The determination of surface-active sites in metal nanoclusters is of great significance for the in-depth understanding of structural evolutions and physicochemical property mechanisms. In this work, the surface-active sites of the AuAg(DMBT)(DPPOE) cluster template towards metal-/ligand-exchange reactions were unambiguously identified at the atomic level. The active-site tailoring of this nanocluster gave rise to three derivative nanoclusters, AuAgCu(DMBT)(DPPOE), AuAg(DMBT)(DCBT)(DPPOE), and AuAg(DCBT)(DPPOE). The single-crystal structural analysis revealed that all these M (M = Au/Ag/Cu) clusters exhibited almost the same framework. Besides, the surface-active site tailoring contributed to significant changes in optical absorptions and emissions of these metal nanoclusters. The findings in this work not only provide an in-depth understanding of the active-site tailoring of cluster surface structures but also develop an intriguing template that enables us to grasp the structure-property correlations at the atomic level.
确定金属纳米团簇中的表面活性位点对于深入理解其结构演变和物理化学性质机制具有重要意义。在这项工作中，在原子水平上明确鉴定了AuAg(DMBT)(DPPOE)团簇模板对金属/配体交换反应的表面活性位点。该纳米团簇的活性位点剪裁产生了三种衍生纳米团簇，即AuAgCu(DMBT)(DPPOE)、AuAg(DMBT)(DCBT)(DPPOE)和AuAg(DCBT)(DPPOE)。单晶结构分析表明，所有这些M（M = Au/Ag/Cu）团簇都表现出几乎相同的骨架结构。此外，表面活性位点剪裁导致这些金属纳米团簇的光吸收和发射发生显著变化。这项工作中的发现不仅为深入理解团簇表面结构的活性位点剪裁提供了依据，还开发了一种有趣的模板，使我们能够在原子水平上掌握结构-性质关系。
