Used primarily as a key intermediate in the synthesis of conjugated polymers and small-molecule organic semiconductors. Its brominated alkyl side chains enable efficient functionalization via cross-coupling reactions, making it valuable in the development of organic light-emitting diodes (OLEDs) and organic photovoltaics (OPVs). The fluorene core provides high thermal stability and favorable electronic properties, enhancing charge transport in thin-film transistor applications. Also employed in the preparation of dendrimers and macromolecular architectures where precise branching and electronic tuning are required.