Used as a key building block in organic synthesis, particularly in the preparation of conjugated polymers and organic electronic materials. Its rigid, linear structure with extended π-conjugation makes it valuable in the development of organic light-emitting diodes (OLEDs), field-effect transistors (OFETs), and photovoltaic devices. It is also employed in cross-coupling reactions to construct complex aromatic and acetylenic frameworks for advanced materials research. Due to its ability to participate in Sonogashira and other palladium-catalyzed reactions, it is widely used in the synthesis of molecular wires and nanoscale electronic components.