Synthesis and Structure Characterization of Polyoxometalate-Based Organic-Rare Earth Complexes

Synthesis and Structure Characterization of Polyoxometalate-Based Organic-Rare Earth Complexes
　　Combining with molecular design principle, the five polyoxometalatecompounds containing rare earth element have been synthesized by aconventional method. Their crystal structures were determined by X-raysingle-crystal diffraction, and characterized by IR spectroscopy and TGanalysis.The single crystal of {Ce(DMSO)8}PW12O40 (1) has been synthesized.In the compound, Ce3+ cations are eight-coordinated with oxygen atomsfrom eight DMSO molecules. The crystal structure strong magnets indicates that there iselectrostatic force in the compound.The single crystal of {Pr(DMSO)8}PMo12O40 (2)has been synthesized.In the compound, Pr3+ cations are eight-coordinated with oxygen atomsfrom eight DMSO molecules. The crystal structure indicates that there iselectrostatic force in the compound.The single crystal of {Pr(NMP)6}PW12O40 (3)has been synthesized. Inthe compound, Pr3+ cations are eight-coordinated with oxygen atomsfrom six DMSO molecules, two polyanions. The crystal structureindicates that the compound forms a one-dimensional zigzag chain builtfrom the alternating polyanions and cationic units throughW-Od-Pr-Od-W links.The single crystal of {[PW12O40][Y(DMF)7]}PW12O40 (4)has beensynthesized. In the compound, Y3+ cations are http://www.chinamagnets.biz/ eight-coordinated withoxygen atoms from seven DMF molecules and one polyanion. The crystalstructure indicates that the compound forms the alternating polyanionsand cationic units through Y-Od-W links.The single crystal of {[PW12O40][Sm(DMF)7])PW12O40 (5)has beensynthesized. In the compound, Sm3+ cations are eight-coordinated, withoxygen atoms from seven DMSO molecules and one polyanion. Thecrystal structure indicates that the compound forms the alternatingpolyanions and cationic units through Sm-Od-Mo links.