Used as a key building block in organic synthesis, particularly in the preparation of conjugated polymers and molecular wires due to its rigid, linear structure and ability to participate in Sonogashira coupling reactions. Its carboxylic acid functionality allows for easy attachment to surfaces, nanoparticles, or integration into metal-organic frameworks (MOFs), making it valuable in materials science for developing conductive or optoelectronic materials. Also employed in the synthesis of carbon-rich aromatic systems for use in organic semiconductors and nanotechnology applications.