Used as a key intermediate in the synthesis of metal-organic frameworks (MOFs), particularly those designed for gas storage and separation. Its ethynyl group allows for post-synthetic modification via click chemistry, enabling functionalization of porous materials. Also employed in the preparation of fluorescent polymers and conjugated networks for optoelectronic applications due to the rigidity and conjugation of its structure. Its ester groups facilitate coordination with metal ions in crystal engineering, making it valuable in designing porous coordination polymers.