A new modification of [Ag4Br4(PPh3)(4)]: synthesis, structure and properties

作者：Han, Xintong; Mao, Shanshan; Li, Chuang; Shen, Kesheng; Shi, Xinkui; Huang, Guozhen; Wu, Huilu^*

来源：Zeitschrift Fur Naturforschung Section B-a Journal of Chemical Sciences, 2018, 73(10): 733-738.

DOI：10.1515/znb-2018-0113

• cluster
• crystal structure
• electrochemical study
• fluorescence
• silver

A new modification of the homometallic silver(I) cluster [Ag4Br4(PPh3)(4)] has been prepared and characterized by elemental analysis, UV/Vis and IR spectroscopy, and X-ray crystallography. The tetramer shows a poly cyclic structure with a chair conformation. The bromine atoms adoptit: mu(2)- and mu(3)-bridging modes. The shortest Ag-Ag distance in the cluster is 3.159(2) angstrom, which indicates significant Ag-Ag interactions. A supramolecular structure is arranged by hydrogen bonds (C-H center dot center dot center dot Br). Cyclic voltammograms of the cluster indicate a quasi-reversible Ag+/Ag couple. The fluorescence properties of the ligand and the Ag(I) cluster were studied in the solid state. The emission peaks of the Ag(I) cluster are attributed to ligand-centered luminescence.

• 出版日期2018-10
• 单位兰州交通大学