A novel fluorescent probe for rapid detection of 2,4,6-trinitrophenol based on diphenylsulfone-functionalized coumarin derivative

We report a novel diphenylsulfone-functionalized coumarin derivative with a large Stokes shift (180 nm), which was used to develop a sensor for the determination of 2,4,6-trinitrophenol（TNP) in the DMF/H2O solution based on the fluorescence quenching and the color’s change. The experimental results showed that the chemosensor can selectively detect TNP without interference from other nitroaromatic explosives and common metal ions in natural water. There was a good linear relationship between the fluorescence intensities of the chemosensor and TNP concentration (5–50) × 10−7 M, displaying a limit of detection of 2.15 × 10−7 M.