Used as a key building block in organic synthesis, particularly in the preparation of conjugated polymers and molecular wires. Its ethynyl groups enable coupling reactions, such as Sonogashira cross-coupling, to extend π-conjugated systems for electronic materials. The diethoxy substituents enhance solubility and influence electronic properties, making it valuable in the development of organic semiconductors, optoelectronic devices, and conductive frameworks. Also employed in the synthesis of metal-organic frameworks (MOFs) and covalent organic frameworks (COFs) due to its rigid, planar structure and reactive functional groups.