Used as an intermediate in the synthesis of organic semiconductors and optoelectronic materials. Commonly employed in the production of conjugated polymers for applications in organic light-emitting diodes (OLEDs) and organic photovoltaics (OPVs). Its rigid fluorene backbone with chlorine substituents enhances electronic properties and facilitates further functionalization in polymer chains. Also utilized in the development of fluorescent dyes and sensors due to its stable aromatic structure and ability to modify emission characteristics.