Triggered emission for rapid detection of hydrogen sulfide chaperoned by large Stokes shift

Abstract Current manuscript demonstrates the development of a reaction-based "turn-on" green emissive molecular probe ( P4 ) for rapid detection of H 2 S in physiological condition. The probe was found to exhibit low limit of detection (1.19 μM), along with high selectivity, large Stokes shift and good quantum efficiency. The change in the optical behaviour of the probe was also theoretically scrutinized employing density functional theory calculations which stand in the strong agreement with the photophysical outcomes. Given the demand for large Stokes dyes for sensing applications mainly because of their special photophysical properties, and as the reported number is very limited, the present probe with 110 nm Stokes shift is a good addition in the area of large Stokes dyes for H 2 S recognition in physiological conditions.