A novel fluorescent epoxy resin for organophosphate pesticide detection

作者：Zhang Hong Xing; Wei Ren Bo; Chen Chuan Zhi; Tuo Xin Lin; Wang Xiao Gong^*

来源：Chinese Chemical Letters, 2015, 26(1): 39-42.

DOI：10.1016/j.cclet.2014.10.014

• MeBIP
• Epoxy resin
• Europium complex
• Fluorescence quenching
• Organophosphates

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 (H-1 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 K-sv, for quenching at 617 nm was determined to be 0.377 x 10(3) 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.

• 出版日期2015-1
• 单位清华大学