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

Abstract

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.

Graphical Abstract

Keywords:

• Diphenylsulfone
• coumarin
• fluorescent chemosensor
• TNP
• water-bearing medium

Additional information

Funding

This work was supported by the Funded by Research Foundation of the Institute of Environment-friendly Materials and Occupational Health of Anhui University of Science and Technology (Wuhu) (Grant No. ALW2020YF06); the Key Research and Development Projects in Anhui Province (Grant No. 202004h07020022).