Combined spectroscopic study on the growth mechanism of Diphosphine-stabilized Gold Nanoclusters

16th International Conference on X-ray Absorption Fine Structure

Bao, Jie^1 ; Yang, Lina^1 ; Liu, Wei^1 ; Huang, Yuanyuan^1 ; Huang, Ting^1 ; Cao, Yuanjie^1 ; Yao, Tao^1 ; Sun, Zhihu^1 ; Wei, Shiqiang^1

National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei

230029, China^1

关键词: Au nanoclusters;    Critical steps;    Diphosphine ligand;    Formation process;    Gold nanocluster;    Growth mechanisms;    Mechanism of formation;    Spectroscopic studies;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/712/1/012108/pdf
DOI  :  10.1088/1742-6596/712/1/012108

来源: IOP

【 摘 要 】

The formation process of 1,5-Bis(diphenylphosphino) pentane (L5)-protected Au nanocluster through the reduction of precursor Au2L5Cl2by borane-tert-butylamine (TBAB) is traced by a combination of time-dependent x-ray/UV-vis absorption spectroscopies and mass spectrometry. It is revealed that the initial generation of dual-core basic unit Au4L52Cl is a critical step, which allows for a subsequent size-growth process via incorporation of the existing Au monomer (Au(I)-Cl) or Au2L5to form Au5L52, Au8L53Cl, Au10L54Cl and finally main Au11L54Cl2This work advances one step further toward understanding the mechanism of formation and growth of diphosphine ligands-protected Au NCs.