Used as a chelating ligand in coordination chemistry, particularly in the formation of metal complexes for catalytic applications. Its rigid aromatic structure and ethynyl groups enhance electronic communication in metal-organic frameworks and molecular electronics. Commonly employed in the development of luminescent sensors and as a building block in supramolecular architectures due to its ability to stabilize transition metals and facilitate charge transfer processes. Also finds use in advanced materials research, including conductive polymers and nanoscale devices.