Used as a fluorescent probe in biochemical and materials science research due to the strong photophysical properties of the pyrene moiety. The disulfide linker allows for reversible binding in redox-responsive systems, making it useful in the design of smart drug delivery carriers and sensors for cellular redox environments. Commonly employed in surface modification of nanoparticles and self-assembled monolayers where fluorescence signaling is required. Also applied in studying membrane dynamics and protein interactions owing to its environment-sensitive emission behavior.