Microchimica Acta ( IF 5.3 ) Pub Date : 2021-08-16 , DOI: 10.1007/s00604-021-04936-5 Ying Zhang 1 , Dianwei Zhang 1 , Yuan Zhao 1 , Xinyue Yuan 1 , Huilin Liu 1 , Jing Wang 1 , Baoguo Sun 1
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A robust multi-dimensional sensing array based on VBimBF4B/MAA-anchored quantum dot (QD)-grafted covalent organic frameworks (COFs) [(V-M)/QD-grafted COFs] was established via one-pot strategy. The multi-dimensional sensing array has the outstanding advantages of physicochemical and thermal stability, large specific surface area, and regular pore structures. The assistance of ionic liquid VBimBF4B enhanced the transduction efficiency, and the synergistic effect of COFs enhanced detection efficiency. The improved multi-dimensional sensing array by COFs and ionic liquid VBimBF4B served to identify seven insecticides by non-specific interactions via hydrogen bonding, and the differences in the kinetics of the binding to the insecticides resulted in variation of the three-output channel (fluorescence, phosphorescence, and light scattering) signals, thus generating a distinct optical fingerprint. The unique fingerprint patterns of seven kinds of common insecticides at 200 μg L−1 were successfully discriminated using principal component analysis and clustered heat map analysis. The multi-dimensional sensing array showed a response to seven insecticides based on three spectral channels over the range of 0.001–0.4 μg mL−1 with a limit of detection of 1.08–18.68 μg L−1. The spiked recovery of tap water was 79.86–134.22%, with RSD ranging from 0.89–14.9%. This study broadens the applications of sensing arrays technology and provides a promising building block for insecticide determination.
Graphical abstract
中文翻译：
基于离子液体辅助量子点接枝共价有机骨架的多维传感阵列，用于使用主成分分析和聚类热图鉴别杀虫剂
通过一锅策略建立了基于VBimBF 4 B/MAA锚定量子点（QD）接枝共价有机框架（COF）[（VM）/QD接枝COF]的稳健多维传感阵列。多维传感阵列具有理化和热稳定性、比表面积大、孔隙结构规则等突出优点。离子液体VBimBF 4 B的辅助提高了转导效率，COFs的协同作用提高了检测效率。COFs和离子液体VBimBF 4改进的多维传感阵列B 用于通过氢键的非特异性相互作用识别七种杀虫剂，与杀虫剂结合动力学的差异导致三输出通道（荧光、磷光和光散射）信号的变化，从而产生独特的光学指纹。使用主成分分析和聚类热图分析成功区分了 200 μg L -1的七种常见杀虫剂的独特指纹图谱。多维传感阵列基于三个光谱通道显示对七种杀虫剂的响应，范围为 0.001-0.4 μg mL -1，检测限为 1.08-18.68 μg L -1. 自来水的加标回收率为 79.86–134.22%，RSD 范围为 0.89–14.9%。这项研究拓宽了传感阵列技术的应用，并为杀虫剂测定提供了一个有前途的基石。
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