Used as a monomer in the synthesis of functional polymers, particularly in the development of advanced optical materials. Its rigid fluorene core and reactive methoxymethyl groups enable the creation of high-performance polymers for OLEDs and organic semiconductors. Commonly applied in electron-transport layers and emissive layers in organic light-emitting diode devices due to its good thermal stability and tunable electronic properties. Also serves as a building block in crosslinkable polymers for photoresists and dielectric materials in electronic applications.