School of Chemistry and Chemical Engineering, Hunan Institute of Science and Technology, Yueyang, China.
J Mol Recognit. 2020 Aug;33(8):e2844. doi: 10.1002/jmr.2844. Epub 2020 Mar 26.
A novel type of magnetic molecularly imprinted polymers (MMIP) as the solid-phase extraction sorbent was prepared, which can extract effectively the allocryptopine from the waster of Macleaya cordata (Willd) R. Br. In this study, MMIP was synthesized by using Fe O @SiO , 4-vinyl-pyridine, ethylene glycol dimethacrylate, and allocryptopine, and these ingredients worked as magnetic core, functional monomer, cross-linker, and template, respectively. Concluded by the calculation of Gaussian 09 software, different ratio models of 4-vinyl-pyridine and allocryptopine were simulated, and the optimal ratio was 1:5 and the energy was -2205.34 kJ/mol. Transmission electron microscopy, vibration sample magnetometry, X-ray diffraction, Fourier transform infrared spectroscopy, and thermogravimetric analysis were used to determine the morphology and structure of MMIP. Furthermore, the results of adsorption experiments indicated that MMIP had high selectivity, excellent recyclability, and good adsorption performance (9.86 mg/g, 298 K). The adsorption process was consistent with the Langmuir adsorption isotherm (R > 0.98, 298 K) and pseudo-second-order kinetics model (R > 0.99, 298 K). After six times adsorption-desorption experiments, the adsorption amount of MMIP only reduced to 8.5%. In the experiments of selective adsorption, MMIP has better adsorption properties for allocryptopine (ALL, C H NO ) than those having the same functional group. The limit of detection (LOD) was 0.4 μg/mL. The relative standard deviation ranged from 0.09% to 0.72%. The recovery of allocryptopine in samples ranged from 93.60% to 106.19%. In addition, the synthesized complex had a certain adsorption effect on allocryptopine separating from the wastewater of Macleaya cordata (Willd) R. Br.
一种新型的磁性分子印迹聚合物（MMIP）作为固相萃取吸附剂被制备出来，该吸附剂可以从博落回废水中有效地提取阿藿碱。在本研究中，MMIP 是通过 Fe O @SiO 、4-乙烯基吡啶、乙二醇二甲基丙烯酸酯和阿藿碱合成的，它们分别作为磁性核、功能单体、交联剂和模板。通过 Gaussian 09 软件的计算，模拟了不同比例的 4-乙烯基吡啶和阿藿碱模型，最佳比例为 1:5，能量为-2205.34kJ/mol。透射电子显微镜、振动样品磁强计、X 射线衍射、傅里叶变换红外光谱和热重分析用于确定 MMIP 的形态和结构。此外，吸附实验结果表明 MMIP 具有高选择性、优异的可回收性和良好的吸附性能（9.86mg/g，298K）。吸附过程符合 Langmuir 吸附等温线（R>0.98，298K）和准二级动力学模型（R>0.99，298K）。经过六次吸附-解吸实验后，MMIP 的吸附量仅降低到 8.5%。在选择性吸附实验中，MMIP 对阿藿碱（C H NO ，ALL）的吸附性能优于具有相同官能团的物质。检测限（LOD）为 0.4μg/mL。相对标准偏差范围为 0.09%至 0.72%。阿藿碱在样品中的回收率在 93.60%至 106.19%之间。此外，合成的复合物对从博落回废水中分离阿藿碱具有一定的吸附作用。
