Redox-switchable tetra-copper assembly of N,N-, N,O-phenolate-phenanthroimidazolate bridging ligands

A redox-active dianionic N,O-phenolate-imidazolate/N,N-phenanthroline bridging ligand is used to form unique square-like neutral tetra-Cu(II) assemblies, the structural, magnetic, electronic and redox properties of which are herein described.