化学
荧光团
羧酸酯酶
荧光
农药残留
部分
杀虫剂
组合化学
有机化学
环境化学
酶
物理
量子力学
农学
生物
作者
Shan Luo,Ruichao Peng,Ying Wang,Xianjun Liu,Jiali Ren,Wang Li,Ying Xiong,Sojung Yi,Qian Wen
标识
DOI:10.1007/s00216-023-04801-9
摘要
Pesticide residues significantly affect food safety and harm human health. In this work, a series of near-infrared fluorescent probes were designed and developed by acylating the hydroxyl group of the hemicyanine skeleton with a quenching moiety for monitoring the presence of organophosphorus pesticides in food and live cells. The carboxylic ester bond on the probe was hydrolyzed catalytically in the presence of carboxylesterase and thereby the fluorophore was released with near-infrared emission. Notably, the proposed probe 1 exhibited excellent sensitivity against organophosphorus based on the carboxylesterase inhibition mechanism and the detection limit for isocarbophos achieved 0.1734 μg/L in the fresh vegetable sample. More importantly, probe 1 allowed for situ visualization of organophosphorus in live cells and bacteria, meaning great potential for tracking the organophosphorus in biological systems. Consequently, this study presents a promising strategy for tracking pesticide residues in food and biological systems.
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