A new three-dimensional organic-inorganic hybrid constructed from Keggin polyoxometalates and CuI–pyrazine coordination polymers

•A new polyoxometalate-based hybrid was hydrothermally synthesized in situ.•An interesting 1D chain constructed from Keggin polyoxoanions and copper ions.•Complex 1 exhibits 3D network with new topology (46 · 47)3 (46 · 66 · 83).•Complex 1 shows good photocatalytic activity.

A new Keggin polyoxotungstate-based complex, [Cu(pz)]3[PW12O40] (pz = pyrazine, 1), has been synthesized and characterized by elemental analyses, IR, TG, and X-ray single crystal diffraction. In complex 1, one Keggin polyoxoanion coordinated with six copper cations to form an interesting one-dimensional chain, which was further linked by arrays of Cu(pz)nn + polymeric chains to construct high dimensional network. Topological analysis reveals that complex 1 exhibits a (4, 6)-connected three-dimensional framework with new topology (46 · 47)3 (46 · 66 · 83). Complex 1 shows good photocatalytic activity for the photodegradation of methyl orange in the presence of H2O2 under UV light irradiation.

Graphical abstractA new complex constructed from Keggin polyoxoanions and CuI–pyrazine coordination polymers to form high dimensional network with new topology (46 · 47)3 (46 · 66 · 83).Figure optionsDownload full-size imageDownload as PowerPoint slide