Used as a key intermediate in organic synthesis, particularly in Suzuki-Miyaura cross-coupling reactions for the preparation of conjugated polymers and small-molecule semiconductors. Its spirobifluorene core provides structural rigidity and thermal stability, making it valuable in the development of materials for organic light-emitting diodes (OLEDs), organic photovoltaics (OPVs), and perovskite solar cells. The boronate ester groups allow for efficient and selective coupling with aryl halides, enabling the construction of complex π-conjugated systems with tunable electronic properties. Commonly employed in hole-transport materials and as a building block in high-performance optoelectronic devices.