Used as a key building block in organic synthesis, particularly in the preparation of conjugated polymers and molecular wires. Its ethynyl groups readily undergo coupling reactions, enabling the extension of π-conjugated systems for applications in organic electronics, such as organic light-emitting diodes (OLEDs) and field-effect transistors (OFETs). Also employed in the development of porous aromatic frameworks and covalent organic frameworks (COFs) due to its rigid, planar structure and ability to form extended networks. Its methoxy substituents can influence solubility and electronic properties, making it useful in tuning the performance of optoelectronic materials.