Fluorescence sensor based on layer-by-layer ligand self-assembled gold nanoclusters for on-site monitoring of chlorpyrifos
文献类型： 外文期刊
作者： Chen, He 1 ; An, Li 1 ; Jin, Zhong 1 ; Zhou, Juan 1 ; Ma, Huan 1 ; Ma, Jingwei 1 ; Li, Meng 1 ; Zhang, Di 1 ; Zheng, Lufei 3 ; Wu, Xujin 1 ;
作者机构： 1.Henan Acad Agr Sci, Inst Qual & Safety Agroprod, Zhengzhou 450002, Peoples R China
2.Henan Inst Sci & technol, Coll Resources & Environm, Xinxiang 475004, Henan, Peoples R China
3.Chinese Acad Agr Sci, Inst Qual Stand & Testing Technol, Beijing 100081, Peoples R China
关键词： Gold nanoclusters; Fluorescence sensor; Organophosphorus pesticides; Self-assembly; Layer-by-layer triple-ligand
期刊名称：FOOD CHEMISTRY （ 影响因子：9.8； 五年影响因子：9.7 ）
ISSN： 0308-8146
年卷期： 2025 年 487 卷
页码：
收录情况： SCI
摘要： The application of simple, sensitive, and reliable fluorescence sensors to measure trace targets still remains challenges, especially in identifying ideal fluorophores and developing innovative strategies. Herein, layer-bylayer self-assembly triple-ligand gold nanoclusters (L3-AuNCs) were developed using 6-aza-2-thiothymine, Larginine, and trimethylphenylammonium, where the three ligands effectively suppressed the non-radiative decay of L3-AuNCs and helped achieve a high absolute quantum yield of 28.34%. More interestingly, L3-AuNCs exhibited a distinctive response to both pH and thiol compound, which can be generated through the acetylcholinesterase catalyzed hydrolysis of acetylthiocholine. Using chlorpyrifos as a model analyte, the limit of detection and linear range for the L3-AuNCs-based fluorescence sensor were 0.10 ng mL- 1 and 0.39-50 ng mL-1, respectively. The average recoveries were 83.8%-104.4% in spiked chive, cowpea, celery, and Chinese yam samples. This research opens a new avenue for chlorpyrifos monitoring in the field of food chemistry through material technology innovation.
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