Used as a key intermediate in organic synthesis, particularly in the preparation of functionalized fluorene derivatives which are important in the development of organic semiconductors and optoelectronic materials. It serves as a building block in the synthesis of conjugated polymers and small molecules for use in organic light-emitting diodes (OLEDs) and organic photovoltaics (OPVs). Its bromine functionality allows for palladium-catalyzed cross-coupling reactions, enabling the introduction of various substituents to tailor material properties. Also employed in the synthesis of fluorescent dyes and sensors due to the inherent photophysical characteristics of the fluorenone core.