Used as a key intermediate in organic synthesis, particularly in the preparation of functionalized fluorene derivatives for optoelectronic materials. It serves in the development of organic semiconductors and is employed in the synthesis of conjugated polymers for OLEDs and organic photovoltaics. Also utilized in cross-coupling reactions to build complex aromatic structures for pharmaceuticals and agrochemicals. Its bromine functionality allows for easy modification via metal-catalyzed reactions like Suzuki or Heck couplings. Additionally, it acts as a building block in the creation of fluorescent dyes and sensors due to the inherent fluorescence of the fluorenone core.