Lanthanum ions assisted non-enzymatic ratiometric fluorescence probe for monitoring fenthion residues in agro-product samples.
Lanthanum ions assisted non-enzymatic ratiometric fluorescence probe for monitoring fenthion residues in agro-product samples.
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DOI：
10.1016/j.aca.2022.340579
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发表时间：
2022-11
影响因子：
6.2
通讯作者：
Mengting Guan;Haibo He;Ruxing Li;X. Si;Xitian Peng;Xiaoxia Yan;Zhaosheng Yang;Enhsuan Nien
中科院分区：
文献类型：
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作者：
Mengting Guan;Haibo He;Ruxing Li;X. Si;Xitian Peng;Xiaoxia Yan;Zhaosheng Yang;Enhsuan Nien
本工作制备了La~(3+)辅助的谷胱甘肽修饰的金纳米团簇和碳点(GSH-Au NCS/CDS)纳米平台，用于对杀菌硫磷(Fen)的灵敏检测。由于La3+诱导的聚集诱导发射增强(AIEE)效应，GSH-Au纳米管的荧光响应显著增强，而加入FeN后，由于La3+与FeN的配位作用，这种增强作用进一步增强。以Cd S的荧光强度为信号背景，GSH-Au NCS和Cd S的比值荧光与Fen的浓度在0.0 1~1.1 0μg/m L−1范围内呈良好的线性关系，检测Fen具有良好的灵敏度，最低检测下限为6.74g−1。利用连续的GSH-Au NCS的非酶策略，在农产品中有机磷农药的快速筛选方面具有很大的潜力。
In this work, a La3+assisted glutathione-capped gold nanoclusters and carbon dots (GSH-Au NCs/CDs) nanoplatform for sensitive detection of fenthion (FEN) is fabricated. The fluorescence response of GSH-Au NCs significantly increases due to aggregation-induced emission enhancement (AIEE) effect induced by La3+, which is further enhanced with adding FEN due to the coordination between La3+and FEN. Taking the fluorescence intensity of CDs as the signal background, the ratiometric fluorescence of GSH-Au NCs and CDs has a good linear relationship with the FEN concentration from 0.01 to 1.10 μg mL−1, and detecting FEN exhibits a good sensitivity at a low detection limit of 6.74 ng g−1. The La3+assisted GSH-Au NCs/CDs nanoplatform demonstrates desirable selectivity and applicability for monitoring trace level of FEN in fruit and vegetable samples. The non-enzymatic strategy by taking advantage of successive AIEE of GSH-Au NCs has a great potential for facile screening organophosphate pesticides in agro-products.