Used in organic synthesis as a building block for pharmaceuticals and functional materials. Acts as a derivatizing agent for amines and alcohols in analytical chemistry to enhance detection by fluorescence or UV. Employed in the preparation of fluorescent dyes and polymers due to the rigid fluorene backbone. Also utilized in the development of liquid crystals and optoelectronic materials for organic light-emitting diodes (OLEDs). Serves as a ligand or intermediate in metal-catalyzed reactions.