Synthesis and characterization of the highest connected 3D Wells-Dawson POM/TMC hybrid

A novel 3D hybrid compound based on TMCs modified Wells-Dawson polyoxometalate, [{Ag(H2O)(phnz)}{Ag(phnz)}5(P2W18O62)][phnz]0.5 · 4H2O (1) (phnz = phenazine), has been synthesized and characterized. X-ray diffraction analysis reveals that the periphery of the Wells-Dawson POMs contains nine Ag-phnz units, which represents the highest connection of the Wells-Dawson POMs up to now. In the crystal engineering point of view, Ag atoms exhibit rich and novel coordination geometries, which facilitate the formation of the highest coordination number of the Wells-Dawson POMs. Additionally, the electrochemical behavior of 1 modified CPE (1-CPE) has been studied.