Abstract
A novel organic–inorganic polymer of {H[Ba(DMF)6(PMo12O40)]·(dma)} n (dma = dimethylamine, DMF = N,N-dimethylformamide) has been synthesized and characterized. Single-crystal X-ray structural analysis indicates that the title compound crystallizes in a monoclinic lattice, C2/c with a = 22.336(5), b = 12.798(3), c = 21.498(4) Å, β = 99.77(3)°, Z = 4, V = 6065(2) Å3, D c = 2.673 Mg m−3, F(000) = 4620, R 1 = 0.0600, wR 2 = 0.1125. Crystal structural analysis reveals that Ba2+ ion lies in a distorted square antiprismatic environment with eight oxygen atoms, six from DMF molecules and two from adjacent polyanions. [Ba(DMF)6]2+ ions coordinated to [PMo12O40]3− building blocks form a 1D corrugated chain. The results of the single crystal X-ray diffraction and IR spectra show the metal cations are coordinated to Keggin clusters. The ESR spectra show that the title compound is strongly photosensitive towards sunlight. Cyclic voltammetry shows that the title compound undergoes five two-electron reversible reductions and the [PMo12O40]3− anions are the active centers for electrochemical redox reactions in solution.
Published Version
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