Synthesis, crystal structure and luminescence of novel two-dimensional interpenetrating frameworks

Two novel metal coordination polymers, [Zn(nic)(isonic)]n (1) and [Cu(nic)(isonic)]n (2) (H2nic = nicotinic acid, H2isonic = isonicotinic acid), have been hydrothermally synthesized. In 1 and 2, two-dimensional interpenetrating (4, 4) frameworks were bridged by nic and isonic ligands, and further assembled into three-dimensional supramolecular structures via a π-π stacking interaction.