Abstract
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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19 December 2023
A Correction to this paper has been published: https://doi.org/10.1007/s00216-023-05112-9
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Funding
This work was financially supported by the Program for Science & Technology Innovation Platform of Hunan Province (2019TP1029) and Food Safety Monitoring and Early Warning open Project of Hunan Provincial Key Laboratory (2020KFJJ01).
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Luo, S., Peng, R., Wang, Y. et al. Enzyme-targeted near-infrared fluorescent probe for organophosphorus pesticide residue detection. Anal Bioanal Chem 415, 4849–4859 (2023). https://doi.org/10.1007/s00216-023-04801-9
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DOI: https://doi.org/10.1007/s00216-023-04801-9