Deng Huijuan, Li Xiaowu, Yan Xiaoxun, Jin Shan, 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, Anhui University, Hefei, China.
Anhui Province Key Laboratory of Chemistry for Inorganic/Organic Hybrid Functionalized Materials, Institutes of Physical Science and Information Technology, Anhui University, Hefei, China.
Front Chem. 2022 Jan 24;9:793339. doi: 10.3389/fchem.2021.793339. eCollection 2021.
Tailoring of specific sites on the nanocluster surface can tailor the properties of nanoclusters at the atomic level, for the in-depth understanding of structure and property relationship. In this work, we explore the regulation of surface structure of AuAg(SAdm)(Dppm)Cl nanocluster alloying. We successfully obtained the well-determined tri-metal AuAg@Cu(SAdm)(Dppm)Cl by the reaction of AuAg(SAdm)(Dppm)Cl with the Cu(SAdm) complex precursor. X-ray crystallography identifies that the Cu dopants prioritily replace the position of the silver capped by Dppm ligand in the motif. The Cu doping has affected the optical properties of AuAg alloy nanocluster. DPV spectra, CD spectra and stability tests suggest that the regulation of surface structure Cu alloying changes the electronic structure, thereby affecting the electrochemical properties, which provides insight into the regulation of surface structure of AuAg(SAdm)(Dppm)Cl alloying.
在纳米团簇表面特定位点的定制能够在原子水平上定制纳米团簇的性质，以深入理解结构与性质的关系。在这项工作中，我们探索了AuAg(SAdm)(Dppm)Cl纳米团簇合金化的表面结构调控。通过AuAg(SAdm)(Dppm)Cl与Cu(SAdm)络合物前驱体的反应，我们成功获得了结构确定的三金属AuAg@Cu(SAdm)(Dppm)Cl。X射线晶体学表明，铜掺杂剂优先取代了该结构单元中由Dppm配体包覆的银的位置。铜掺杂影响了AuAg合金纳米团簇的光学性质。差分脉冲伏安光谱、圆二色光谱和稳定性测试表明，通过铜合金化对表面结构的调控改变了电子结构，从而影响了电化学性质，这为AuAg(SAdm)(Dppm)Cl合金化的表面结构调控提供了深入认识。
