An undeca-nuclear nickel substituted POM, namely [Ni(H2O)6][Ni11(PW9O34)2(IDA)3(en)2(Hen)2(OH)6]·(H2O)7·(H2en)2 (1) (en = 1,2-ethylenediamine, H2IDA = iminodiacetic acid), was synthesized through hydrothermal reaction of Na6PW9O34, en, H2IDA and NiCl2·6H2O. Single-crystal structure reveals that 1 can be viewed as Ni6PW9 and Ni5PW9 units linked by a μ3-O bridge and two IDA2− ligands. Magnetic investigation indicates the presence of dominantly ferrimagnetic interactions within the Ni11 core. Electrochemistry study shows that 1 displays a stable and reproducible voltammetric graph.
