A New [PMoO]-Based Ni Compound: Electrochemical and Photocatalytic Properties for Water Pollutant Removal.

A polyoxometalate-based metal-organic complex with the ability to treat pollutants in water was obtained under hydrothermal conditions, namely [Ni(HL)(HL)](PMoO)·3HO·4HO () (HL = 4,4'-(1H,1'H-[2,2'-biimidazole]-1,1'-diyl)dibenzoicacid). Structural analysis reveals that the [Ni(HL)(HL)] units are interconnected into a 2D layer via hydrogen bonds between adjacent carboxyl groups and water molecules of crystallization. [PMoO] anions are embedded within the larger pores of the layer and are connected to the adjacent layers through hydrogen bonds, ultimately expanding the structure into a 3D supramolecular architecture.