Coordination-driven assembly of a supramolecular square and oxidation to a tetra-ligand radical species

The design and synthesis of a supramolecular square was achieved by coordination-driven assembly of redox-active nickel( ii ) salen linkers and (ethylenediamine)palladium( ii ) nodes. The tetrameric geometry of the supramolecular structure was confirmed via MS, NMR, and electrochemical experiments. While oxidation of the monomeric metalloligand Schiff-base affords a Ni( iii ) species, oxidation of the coordination-driven assembly results in ligand radical formation. The design and synthesis of a supramolecular square was achieved by coordination-driven assembly of redox-active nickel( ii ) salen linkers and (ethylenediamine)palladium( ii ) nodes.