Modification chemistry of polyoxometalates by multi-track Cu-N coordination complex chain

INOR 720

Jun Peng, jpeng@nenu.edu.cn and Jingquan Sha, shajq986@nenu.edu.cn. Key Laboratory of Polyoxometalate Science of Ministry of Education, Northeast Normal University, Renmin Street 5268, Changchun,JiLin, 130024, China
Polyoxometalates (POMs)are an outstanding class of inorganic building blocks for the construction of organic-inorganic hybrid materials because of their intriguing structural chemistry, unexpected reactivities and potential applications. Bipyridine(bipy) is a rod-like molecule commonly used as a versatile ligand, and the d10 ions generally show variable coordination numbers and tunable coordination spheres, which can build metal-organic polymer subunits to modify POMs. Herein, three novel POMs obtained by hydrothermal synthesis are reported: 1D {[Cu(4,4-bipy)]3[HGeMo12O40]}.0.5H2O (1), modified by three-track Cu(bipy) chains; 2D {[Cu(4,4'-bipy)]3[W6O19]}.4H2O (2), modified by four-track Cu(bipy) chains and 3D {AsMo12O40(VO)[VO(H2O)]}.[Cu(4,4'-bipy)5.H2O (3), modified by six-track Cu(bipy) chains. Their structural differences reveal that the influence of the size of POMs on the assembly of the solid structures of the POM-based hybrid materials is through changing the number of co-parallel multichains of Cu-N coordination polymer and the dimension of the organic-inorganic hybrid materials