Michael reaction-assisted fluorescent sensor for selective and one step determination of catechol via bifunctional Fe-MIL-88NH2 nanozyme

被引：35
作者：
Hou, Li [1 ]
Qin, Yuemei [1 ]
Lin, Tianran [1 ]
Sun, Ying [1 ]
Ye, Fanggui [1 ]
Zhao, Shulin [1 ]
机构：
[1] Guangxi Normal Univ, State Key Lab Chem & Mol Engn Med Resources, Coll Chem & Pharmaceut Sci, Guilin 541004, Peoples R China
来源：
SENSORS AND ACTUATORS B-CHEMICAL | 2020年 / 321卷
基金：
中国国家自然科学基金;
关键词：
Fluorescence sensor; Michael reaction; Nanozyme; Metal-organic frameworks; Catechol; METAL-ORGANIC FRAMEWORKS; CATALYTIC-ACTIVITY; CARBON NANOTUBES; HYDROQUINONE; WATER; ASSAY; ACID;
D O I：
10.1016/j.snb.2020.128547
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
The synthesized Fe-MIL-88NH2 was used as a nanozyme and fluorescence probe to successfully construct a selective fluorescent sensing platform for one step determination of catechol. Fe-MIL-88NH(2) exhibited excellent peroxidase mimic property as well as fluorescence property. With the addition of H2O2 and catechol, Fe-MIL88NH(2) would catalyze the H2O2 to form hydroxyl radicals ((OH)-O-center dot). Then, the oxidation of catechol would be triggered by the formed (OH)-O-center dot, which resulted in the generation of 1, 2-benzoquinone. Afterwards, Michael reaction between the oxidation products of catechol (1, 2-benzoquinone) and Fe-MIL-88NH(2) ligands was triggered and then quenched the fluorescence of Fe-MIL-88NH(2). The principle of the selective determination of catechol was due to the assistant effect of Michael reaction. Based on the above sensing mechanism, a fluorescent sensing platform for the determination of catechol was established. The limit of detection was 0.0913 mu mol L-1 (3S0, n=8/K) within a fast response of 10 min. This simple and selective strategy, based on the Michael reaction and the superiority of Fe-MIL-88NH(2) nanozyme, provided a concise sensing platform for catechol determination, which broadened the scope of application of nanozyme and showed a great potential application for on-site testing in food and biology analysis.
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页数：7
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