New imine-linked molecularly imprinted covalent organic frameworks (MICOFs) were successfully prepared, using fenvalerate as the dummy template. Schiff base reaction between 1,3,5-tris(4-aminophenyl)benzene and 1,3,5-triformylphloroglucinol was rapidly achieved at room temperature, using Sc(OTf)3 as the catalyst. The surface groups and morphologies of MICOFs were assessed by Fourier transform infrared spectroscopy, Brunauer-Emmett-Teller surface area analysis, and scanning electron microscopy. The MICOFs exhibited high selectivity toward four structurally similar cyano pyrethroids, including fenvalerate, flucythrinate, β-cyfluthrin and λ-cyhalothrin. A method based on solid phase extraction using MICOFs coupled to high performance liquid chromatography was established for the determination of cyano pyrethroids in plant samples. Linearity in the range 0.1-200 ng g-1, with correlation coefficients of 0.9981-0.9993, was obtained for the four cyano pyrethroids. Detection limits and quantification limits were in the range 0.011-0.018 ng g-1 and 0.036-0.060 ng g-1, respectively. Recoveries at three spiked levels ranged from 94.3% to 102.7%. The developed method is thus a promising technique for the selective extraction of cyano pyrethroids from complex matrices.

中文翻译：

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快速、低温合成分子印迹共价有机骨架，用于从植物样品中高选择性提取氰基拟除虫菊酯

以氰戊菊酯为虚拟模板，成功制备了新型亚胺连接的分子印迹共价有机骨架（MICOF）。1,3,5-三(4-氨基苯基)苯和1,3,5-三甲酰基间苯三酚之间的席夫碱反应在室温下快速实现，使用Sc(OTf)3作为催化剂。通过傅里叶变换红外光谱、Brunauer-Emmett-Teller 表面积分析和扫描电子显微镜评估 MICOF 的表面基团和形态。MICOFs对四种结构相似的氰基拟除虫菊酯表现出高选择性，包​​括氰戊菊酯、氟氰菊酯、β-氟氯氰菊酯和λ-三氯氟氰菊酯。建立了基于MICOF固相萃取结合高效液相色谱法测定植物样品中氰基拟除虫菊酯的方法。四种氰基拟除虫菊酯的线性范围为 0.1-200 ng g-1，相关系数为 0.9981-0.9993。检测限和定量限分别在 0.011-0.018 ng g-1 和 0.036-0.060 ng g-1 范围内。三个尖峰水平的回收率从 94.3% 到 102.7% 不等。因此，所开发的方法是一种从复杂基质中选择性提取氰基拟除虫菊酯的有前途的技术。