New polyoxometalate-templated supramolecular networks based on transition metal ions and pyridine-N-oxide ligands

► Two types of neutral pyridine-N-oxide(PNO)-containing ligands were used to prepare new polyoxometalate(POM)-templated supramolecular network assemblies of 1 and 2. ► Both compounds show interesting host-guest structural features and ► exhibit the electrocatalytic activities towards the reduction of nitrite.