Synthesis, Structure And Characterization Of Differrent Size Heteropolymolybdates Compounds

In this paper, we obtain two compounds(compound 1 and compound 2) based on Na₂MoO₄·2 H₂O via water solution synthesis methods. K₅Na₂[Mo₉V₃O₃₈]·9H₂O (1) Na₁₈K₈[{Mo₆O₂₁(H₂O)₃(SO₄)}12(Fe(H₂O)₂)30]·ca.67H₂O (2) Compound 1 is a new butterfly–like molybdodivanadate composed by Mo (VI) and V (V) with the Mo/V ratio 3:1, the polyoxoanion [Mo₉V₃O₃₈ ]7- can be described as two {MMo4O18} (M=Mo/V) units connected by one {V₂O₈} core;Compound 2 is a Keplerate-Type polyoxometalate, which is composed of 12 pentagonal {(Mo)Mo5} units and 30 [Fe(H₂O)2]³⁺ linkers,this giant heterometal Keplerate-Type cluster is supported by SO42- and display interesting three-dimensional topologies.Compound 1 and 2 are characterized by elemental analysis, IR spectroscopy, TG analysis, UV-vis spectroscopy, X-ray photoelectron spectroscopy (XPS), respectively. The electrochemical activities of compound 1 has been studied and the photocatalytic property of the both compounds have been investigated, which show good photocatalysts for the degradation of RhB.