Used as a ligand in transition metal catalysis, particularly in asymmetric synthesis where its tetradentate structure helps stabilize metal complexes for enantioselective reactions. Its pyridyl groups enhance coordination ability, making it effective in palladium- and nickel-catalyzed cross-coupling reactions. Also applied in the development of luminescent metal sensors due to its ability to chelate metal ions and influence photophysical properties. Shows potential in coordination polymers and supramolecular chemistry because of its rigid, extended aromatic framework and strong metal-binding sites.