Used as a key building block in organic semiconductors and optoelectronic materials. Its rigid biphenyl core and ethynyl functional groups enable strong π-conjugation, making it valuable in the synthesis of conjugated polymers and small molecules for organic light-emitting diodes (OLEDs) and field-effect transistors (OFETs). The methyl substituents enhance solubility and influence molecular packing, improving thin-film morphology. Also employed in the development of porous organic frameworks and covalent organic frameworks (COFs) for sensing and catalysis due to its ability to form extended, stable networks.