Synthesis of a new magnetic-MIP for the selective detection of 1-chloro-2,4-dinitrobenzene, a highly allergenic compound.
Synthesis of a new magnetic-MIP for the selective detection of 1-chloro-2,4-dinitrobenzene, a highly allergenic compound.
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DOI：
10.1016/j.msec.2016.12.019
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发表时间：
2017-05
期刊：
影响因子：
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通讯作者：
Rosario Josefina Uzuriaga-Sánchez;Ademar Wong;Sabir Khan;M. Pividori;G. Picasso;M. Sotomayor
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文献类型：
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作者：
Rosario Josefina Uzuriaga-Sánchez;Ademar Wong;Sabir Khan;M. Pividori;G. Picasso;M. Sotomayor
研究了分子印迹聚合物 (MIP) 与磁性纳米颗粒相结合，采用核@壳形式，用于选择性检测 1-氯-2,4-二硝基苯 (CDNB)（一种强致敏物质）。采用共沉淀法制备磁性纳米粒子，并与油酸（OA）混合。然后通过细乳液法将该材料封装在三种类型的疏水性聚合物基质中：聚-(MA-co-EDGMA)、聚-(AA-co-EDGMA)和聚-(1-VN-co-EDGMA)。使用这些基质是因为它们能够与分析物的官能团发生特异性相互作用。最后，在分析物存在下使用沉淀聚合在磁性疏水表面上获得 MIP-CDNB。 XRD 衍射图表明复合材料中存在磁铁矿，SEM 分析显示纳米颗粒尺寸在 10 至 18 nm 之间。在优化的吸附条件下，磁性 MIP 材料表现出比非磁性材料 (4.2 mg g−1) 更高的吸附容量 (5.1 mg g−1)。在磁性 MIP 对 CDNB 的选择性测试中，二氯苯酚和邻硝基苯酚这两种结构相似的化合物的 α 值分别为 2.5 和 10.4，并且没有观察到任何其他非类似分析物的吸附。使用富含 0.5 mg L−1 CDNB 的水应用磁性 MIP 和磁性 NIP，回收率分别达到 83.8（± 0.8）% 和 66（± 1）%，揭示了该材料检测 CDNB 的适用性。
Molecularly imprinted polymers (MIPs) in combination with magnetic nanoparticles, in a core@shell format, were studied for selective detection of 1-chloro-2,4-dinitrobenzene (CDNB), a powerful allergenic substance. Magnetic nanoparticles were prepared by the co-precipitation method and mixed with oleic acid (OA). This material was then encapsulated in three types of hydrophobic polymeric matrix, poly-(MA-co-EDGMA), poly-(AA-co-EDGMA), and poly-(1-VN-co-EDGMA), by the mini-emulsion method. These matrices were used due to their ability to interact specifically with the functional groups of the analyte. Finally, the MIP-CDNB was obtained on the magnetic-hydrophobic surfaces using precipitation polymerization in the presence of the analyte. XRD diffraction patterns suggested the presence of magnetite in the composite and SEM analysis revealed a nanoparticle size between 10 and 18 nm. Under the optimized adsorption conditions, the magnetic-MIP material showed a higher adsorption capacity (5.1 mg g− 1) than its non-magnetic counterpart (4.2 mg g− 1). In tests of the selectivity of the magnetic-MIP towards CDNB, α-values of 2.5 and 10.4, respectively, were obtained for dichlorophenol ando-nitrophenol, two structurally similar compounds, and no adsorption was observed for any other non-analogous analyte. The magnetic-MIP and magnetic-NIP were applied using water enriched with 0.5 mg L− 1of CDNB, achieving recovery values of 83.8(± 0.8)% and 66(± 1)%, respectively, revealing the suitability of the material for detection of CDNB.