Synthesis and Crystal Structure of Decavanadate-Based Coordination Polymers

Two base-decavanadates coordination polymers [H2V10O28](0.5)Ni(phen)(3) (1) and [(C4H14N2)(2)]center dot[Zn(H2O)(6)][V10O28]center dot 6H(2)O (2) (phen = 1,10-phenanthroline) have been synthesized and characterized. They composed by the ligand, transition metal ions, and decavanadates, and both compounds are stable three-dimensional supramolecular structure due to exist of a multitude of hydrogen bonding interactions. The transition metal coordination modes are similar in compounds 1 and 2 as the six-coordinated octahedral structures. However, their coordination atoms are manifestly different. The Ni atom is coordinated with the ligand of phen and coordinated by the nitrogen atom, and the zinc atom is coordinated with oxygen in the water. The electrochemical measurement of cyclic voltammetric and electrocatalytic activities shows that compounds 1 and 2 have good electrochemical properties of hydrogen peroxide reductive.