Syntheses, structures and catalytic properties of Evans-Showell-type polyoxometalate-based 3D metal-organic complexes constructed from the semi-rigid bis(pyridylformyl)piperazine ligand and transition metals.

Herein, two novel Evans-Showell-type polyoxometalate (POM)-based metal-organic complexes, namely, {[Cu(L)(H2O)3][Cu(L)0.5(H2O)][Cu(L)0.5(H2O)4][Co2Mo10H4O38]}·5H2O (1) and [(H2L)0.