A novel fluorescent epoxy resin for organophosphate pesticide detection

In this work, a novel bisbenzimidazolylpyridine-functionalized fluorescent epoxy resin was synthesized for organophosphate pesticide detection. The epoxy resin was characterized by Fourier-transform infrared spectroscopy (FT-IR), proton nuclear magnetic resonance spectroscopy (1H NMR), gel permeation chromatography (GPC), differential scanning calorimetry (DSC) and fluorescence spectroscopy. After loading with Eu(III) ions, the epoxy resin showed a strong fluorescence emission. The fluorescence emission was observed to be instantaneously quenched when exposed to trace amount of diethyl chlorophosphate in solution. The Stern–Volmer quenching constants Ksv for quenching at 617 nm was determined to be 0.377 × 103 L/mol. This sensitive emission-quenching function and easy processing nature of the polymeric support enable the resin to be a promising chemosensor candidate for the detection of organophosphates.

A novel bisbenzimidazolylpyridine-functionalized fluorescent epoxy resin was synthesized for organophosphate pesticide detection.Figure optionsDownload as PowerPoint slide