Abstract
A new Keggin-type heteropolyoxometalates compound, {[Cd(DMA)4]2(bibp)(SiW12O40)}n (1), (DMA = N, N-dimethylacetamide, bibp = 4,4′-bis(1-imidazolyl) biphenyl) has been synthesized and characterized by single-crystal X-ray diffraction, IR spectrum, elemental analysis, powder X-ray diffraction, thermogravimetric (TG) analysis and electrochemical analysis. Compound 1 is crystallized in orthorhombic with Pbca space group. The [SiW12O40]4− anions and bibp ligands are linked by coordinated Cd2+ ions alternately into a zigzag-like chain, and the chains are extended into a three-dimensional (3D) framework by the C–H···O hydrogen bonds. The cyclic voltammetry analyses show that compound 1 presences of W-centered reversible redox processes and that 1 has electrocatalytic activities towards the reduction of nitrite.
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