Used in organic electronics as a building block for conjugated polymers and small molecules in organic semiconductors. Its structure supports extended π-conjugation, making it valuable in the development of organic field-effect transistors (OFETs) and organic photovoltaics (OPVs). The carboxylic acid group allows for functionalization or attachment to surfaces and other molecular components, useful in sensor design and surface modification. Also employed in the synthesis of thiophene-based dyes and luminescent materials.