Used as an intermediate in organic synthesis, particularly in the preparation of conjugated polymers and organic semiconductors. It serves as a building block in Suzuki and other palladium-catalyzed coupling reactions to form fluorene-based derivatives used in OLEDs (organic light-emitting diodes) and PLEDs (polymer light-emitting diodes). Its bromine functionality allows for selective cross-coupling, enabling precise molecular design for electronic materials. Also employed in the synthesis of fluorescent dyes and sensors due to the rigid fluorene core which enhances photostability and quantum yield.