An unprecedented three-dimensional network cadmium coordination polymer containing isonicotinato N-oxido ligand with strong yellow fluorescent emission

The first isonicotinato N-oxido (N-inicO) ligand bridging cadmium three-dimensional network coordination polymer, [Cd(N-inicO)2]·(H2O)2 1, was synthesized using the precursor of N-inicO ligand, 1-oxide-4-cyanopyridine under hydrothermal conditions. The oxygen atom of N-oxido in N-inicO adopts a bidentate-bridging mode to connect with Cd to form a three-dimensional network with porous structure in which water molecules are included in the cavity. The bridging mode of N-inicO ligand is, to the best of our knowledge, unprecedented in the known any metal complexes containing the N-inicO ligand.