介孔 MIP 封端的发光 MOF 作为特异性和灵敏的分析探针：在毒死蜱中的应用,Microchimica Acta

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介孔 MIP 封端的发光 MOF 作为特异性和灵敏的分析探针：在毒死蜱中的应用
Microchimica Acta ( IF 5.3 ) Pub Date : 2020-11-24 , DOI: 10.1007/s00604-020-04654-4
Habibeh Eskandari ₁ , Maliheh Amirzehni ₁ , Javad Hassanzadeh ₂ , Behrouz Vahid ₃

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对有机磷农药 (OP) 的特异性识别是分析研究人员面临的重大挑战。在此，表面印迹的基于铽的发光金属有机框架 (MOF-76) 是一种用于测量毒死蜱 (CP) 的高度特异性探针。使用 CP 作为模板，在纳米尺寸的 MOF-76 表面生成了介孔分子印迹聚合物 (mMIP) 层。得到的 mMIP 封端的 MOF-76（mMIP@MOF-76）含有吸附 CP 分子的特定位点，保证了设计探针的选择性。棒状MOF-76的高孔隙率以及MIP层的介孔结构改善了扩散过程并导致探针的高灵敏度。检测过程基于CP对mMIP@MOF-76荧光发射的显着猝灭作用。绘制 CP 浓度对荧光强度（λex = 285 nm 和 λem = 544 nm）的线性曲线，浓度范围为 10–1000 ng mL-1 CP，检测限为 3.41 ng mL-1。设计的探针用于果汁和环境样品中的 CP 测定。稳定的基于 MOF 的支持，以及其显着的荧光特征和特定的 MIP 位点相结合，形成了高度选择性和超灵敏的检测系统。图形概要以及其显着的荧光特征和特定的 MIP 位点，造就了一个高度选择性和超灵敏的检测系统。图形概要以及其显着的荧光特征和特定的 MIP 位点，造就了一个高度选择性和超灵敏的检测系统。图形概要

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Mesoporous MIP-capped luminescent MOF as specific and sensitive analytical probe: application for chlorpyrifos

Specific recognition of organophosphate pesticides (OPs) is a significant challenge for analytical researchers. Herein, surface imprinted terbium-based luminescent metal-organic framework (MOF-76) are presented as a highly specific probe for the measurement of chlorpyrifos (CP). A mesoporous molecular imprinted polymer (mMIP) layer was generated on the surface of nano-sized MOF-76 using CP, as template. The resulting mMIP-capped MOF-76 (mMIP@MOF-76) contained specific sites for adsorption of CP molecules, guaranteeing the selectivity of the designed probe. The high porosity of rod-shape MOF-76, as well as the mesoporous structure of the MIP layer improved the diffusion process and caused the high sensitivity of the probe. The detection process is based on the remarkable quenching effect of CP on the fluorescence emission of mMIP@MOF-76. Plotting the CP concentration against the fluorescence intensity (λex = 285 nm and λem = 544 nm) gave a linear curve in the concentration range 10–1000 ng mL−1 CP, with 3.41 ng mL−1 limit of detection. The designed probe was utilized for CP determination in fruit juice and environmental samples. The combination of the stable MOF-based support, as well as its remarkable fluorescence features and specific MIP sites, led to a highly selective and ultrasensitive detection system. Graphical abstract

更新日期：2020-11-24

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