“S”-shaped isopolyoxotungstate cluster decorated by calcium ions

One novel “S”-shaped isopolyoxotungstate Ca2(H2O)12{Ca4(H2O)18[H2W11O37]2}·20H2O (1) has been successfully synthesized by the conventional aqueous solution method. Single-crystal X-ray diffraction analysis revealed that compound 1 crystallized in triclinic system, space group P−1, with lattice constants a = 12.591(3) Å, b = 12.738(3) Å, c = 17.961(4) Å, α = 98.97(3)°, β = 99.85(3)°, γ = 93.42(3)°. The “S”-shaped cluster was built from two {W11} subunits, four Ca2+ linking units and two {Ca(H2O)6}2+ decorating fragments. The electrochemical properties of 1 have been investigated in details.

An “S”-shaped isopolyoxotungstate decorated by alkaline earth metal ions was reported, which offered a convincing example that lacunary isopolyoxotungstate could be used as excellent inorganic multidentate O-donor ligands to incorporate functional ions for constructing POM clusters.Figure optionsDownload as PowerPoint slide