An Interpenetrating Architecture Based on the Wells-Dawson Polyoxometalate and AgI• • •AgI Interactions

A new compound based on the Wells-Dawson polyoxometalate, Ag-7(bbi)(5)(OH)(P2W18O62) (b-b-i = 1,1'-(1,4-butanediy)bis(imidazole)) (1), has been hydrothermally synthesized and characterized by the normal physical methods and single-crystal X-ray diffraction. Compound 1 represents the first interpenetrating framework based on the Wells-Dawson POMs. The Ag-I center dot center dot center dot Ag-I interactions are crucial in the formation of the two individual motifs: in the first interpenetrating motif, the supported {Ag-2}(2+) dimers and the P2W18 polyanions form an infinite inorganic chain, then the Ag+ monomers and bbi ligands extend the chain to form a three-dimensional framework. The second motif is constructed by the Ag(-)bbi meso-helix chains which are stitched by the unsupported Ag7 center dot center dot center dot Ag7 dimers to form a twodimensional layer with huge loops. The electrochemical study exhibits that compound 1 could be used as electrocatalyst in the electrical reductions of bromate. In addition, compound 1 shows a photocatalytic action for degradation of RhB.