Used in organic synthesis, particularly in the preparation of conjugated polymers and small molecules for organic electronics. It serves as a key building block in the development of organic light-emitting diodes (OLEDs) and organic photovoltaics (OPVs) due to its ability to facilitate cross-coupling reactions, such as Suzuki-Miyaura coupling. This enables the creation of complex, high-performance materials with tailored electronic properties. Additionally, it is employed in the design of fluorescent probes and sensors for detecting specific analytes in chemical and biological systems. Its spirobifluorene core provides structural rigidity, enhancing the stability and efficiency of the resulting materials.