Synthesis,Structure Characterization And Properties Of Polymolybdate-Based Organic-Inorganic Compounds

In this paper, three polyoxomolybdate compounds have been synthesized with molybdate, metal ions,2-phosphono-aceticacid and 4,4’-bipyridine (bipy) as the main materials through hydrothermal synthesis method. These compounds were characterized by single-crystal X-ray diffraction analys, IR, PXRD, elemental anylyses and so on and their fluorescence properties, thermal stability and electrochemical properties were studied. Besides, the photocatalytic of compound 1 also were studied.The polyoxoanion unit [α-PCuMo11O39]5-giving a straight anionic chain by sharing the terminal oxygen atom of the substituted atom in compound 1. On the Cu2+ and 4,4 bipyridine coordination role making the neighbouring two anion chains joining into a railway-like chain. The anion chains act as two rails and the bipy molecules are viewed as "crosstie". The solution pH value play an important role in the formation of the hybrid materials.Compound 2 is a Anderson-B series of compound. In 2 anion [Al(OH)6(Mo6O18)]3- acts as either the donor or the acceptor of the hydrogen bonds which is the force constructing the 3D supramolecular structure.Compound 3 features a layered network, via the pyridine molecules hydrogen bonds effect link the 2D layers into 3D supramolecular architecture.The electrochemical properties of compounds 1-3 were studied by cyclic voltammetry, which has been shown good stability cyclic voltammetry. As meanwhile, the fluorescence properties were studied, showing that the maximum radiation peak owing to the ligand, and the emission wavelength be assigned to the intraligand charge transfer of the ligands. At the same time, the thermal stability of compounds 1-2 were studied.