Widely used as a fluorescent probe in biological and environmental sensing due to its strong emission and high sensitivity to polarity changes. It serves as a key building block in the development of chemosensors for metal ions, especially copper and mercury, in aqueous and biological systems. Applied in molecular logic gates and optoelectronic devices because of its electron-accepting properties and photochemical stability. Also incorporated into polymers and dyes for use in solar cells and light-emitting diodes (LEDs). Its ability to undergo intramolecular charge transfer makes it valuable in studying protein interactions and DNA binding mechanisms.