Porous polymers from octa(amino-phenyl)silsesquioxane and metalloporphyrin as peroxidase-mimicking enzyme for malathion colorimetric sensor.
Porous polymers from octa(amino-phenyl)silsesquioxane and metalloporphyrin as peroxidase-mimicking enzyme for malathion colorimetric sensor.
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由八（氨基苯基）倍半硅氧烷和金属卟啉制成的多孔聚合物，作为马拉硫磷比色传感器的过氧化物酶模拟酶。
DOI：
10.1016/j.colsurfb.2021.112010
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发表时间：
2021
期刊：
影响因子：
--
通讯作者：
Xiaomei Zhang
中科院分区：
文献类型：
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作者：
Xiao;Mohan Chen;Lu Jing;Jie Li;Yanhong Li;Rui Ding;Xiaomei Zhang
由于农药残留问题日益严重，快速有效的农药检测方法显得尤为重要。本文以八氨基苯基倍半硅氧烷（OAPS）和铁卟啉（FeTPP（NO2）4）为原料，通过简单的偶联反应合成了一种新型的偶氮基多孔有机聚合物偶氮（Fe）PPOP。OAPS的无机笼单元赋予偶氮（Fe）PPOP多孔骨架、高比表面积、良好的热稳定性和化学稳定性。在偶氮（Fe）PPOP中，铁（III）卟啉单元在固定位置被单独分离，这可以有效地避免卟啉单体中发生的二聚或自氧化。这种独特的结构使得偶氮（Fe）PPOP在H2 O2和3，3 ′，5，5 ′-四甲基联苯胺（TMB）存在下表现出优异的类过氧化物酶催化性能。由于这些优点，我们建立了一个选择性，简便，灵敏的比色平台，用于在很短的时间内（3分钟）直接检测马拉硫磷，检测限低（8.5 nM）。此外，偶氮（铁）PPOP与马拉硫磷的识别机制进行了验证，利用X射线光电子能谱。通过对土壤和食品样品中农药残留的检测，进一步验证了该平台的实用性。
Rapid and efficient pesticide detection methods are particularly important due to the growing problems of pesticide residues. Here, a new azo-based porous organic polymer, Azo(Fe)PPOP, was prepared from octa(amino-phenyl)silsesquioxane (OAPS) and iron(III) 5,10,15,20-tetrakis(4-nitrophenyl)porphyrin (FeTPP(NO2)4) via a simple coupling reaction without the participation of metal catalysts. The inorganic cage units of OAPS endowed Azo(Fe)PPOP a porous framework, high surface area, favorably thermal and chemical stability. In Azo(Fe)PPOP, iron(III) porphyrin units were individually isolated in a fixed location, which could effectively avoid dimerization or self-oxidation as happens as in the case of porphyrin monomers. Such a unique structure made Azo(Fe)PPOP exhibit an excellent peroxidase-like catalytic performance in the presence of H2O2and 3,3′,5,5′-tetramethylbenzidine (TMB). Because of these advantages, we established a selective, facile, and sensitive colorimetric platform for direct detection of malathion within a very short time (3 min) with a low detection limit (8.5 nM). In addition, the recognition mechanism between Azo(Fe)PPOP and malathion was verified using X-ray photoelectron spectroscopy spectra. The practicality of the constructed platform was further executed by the detection of the pesticide in soil and food samples.