Used primarily in organic synthesis, this compound serves as a key intermediate in the preparation of fluorescent dyes and optoelectronic materials. Its reactive acid chloride group allows for easy incorporation into larger conjugated systems, making it valuable in the development of organic semiconductors and sensor molecules. It is also employed in the synthesis of functional polymers and liquid crystals, where the fluorenone moiety contributes to electron-accepting properties. Additionally, it finds use in pharmaceutical research as a building block for complex heterocyclic compounds due to its rigid, planar structure and photophysical characteristics.