Used as an intermediate in organic synthesis, particularly in the preparation of functional materials such as organic semiconductors and light-emitting diodes (OLEDs). Its rigid fluorene backbone enhances thermal and oxidative stability, making it valuable in the development of conjugated polymers for electronic applications. Commonly employed in cross-coupling reactions to introduce fluorene moieties into larger π-conjugated systems, improving charge transport and luminescent properties. Also utilized in research toward photovoltaic materials and as a building block in the synthesis of fluorescent dyes and sensors.