材料科学
微球
检出限
荧光
共价键
碳纤维
猝灭(荧光)
化学工程
微乳液
色谱法
核化学
分析化学(期刊)
有机化学
复合材料
肺表面活性物质
复合数
物理
工程类
量子力学
化学
作者
Xinyue Yuan,Wei Jiang,Jing Wang,Huilin Liu,Baoguo Sun
标识
DOI:10.1021/acsami.0c04766
摘要
High-performance, multiporous imprinted microspheres were prepared from nitrogen-doped carbon dots (N-CDs) using a one-pot reverse microemulsion surface-imprinting method. Here, the N-CDs were exfoliated from a common layer covalent organic framework in a top-down preparation, and an ionic liquid was added to improve the sensitivity and the fluorescence stability. The multiporous imprinted microspheres were successfully applied to flonicamid optosensing in fruits and vegetables with simultaneous analysis of 96 samples by multifunctional enzyme labeling. The fluorescence sensing procedure was performed on recyclable multiporous imprinted microspheres coupling with the interface of N-CDs by taking advantage of the fluorescence-resonance charge-transfer strategy between the N-doped carbon dots and flonicamid molecules, quenching the fluorescence intensity. The multiporous imprinted microspheres exhibited purple fluorescence, which decreased sharply in intensity as the concentration of flonicamid increased. The fluorescence quenching correlation with the concentration of flonicamid showed good linearity in the range of 0.02–0.2 μg g–1 with a detection limit of 0.0059 μg g–1. This research not only enriches the foundational study of flonicamid residues but also greatly expands the potential applications of multiporous imprinted microspheres for analysis of pesticide residues in agricultural, food, and environmental monitoring.
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