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Preparation of metallic pivot-based imprinted monoliths with a hydrophilic macromonomer

机译：制备具有亲水性大分子单体的金属枢轴型印迹整体

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A new metallic pivot-based molecularly imprinted polymer (MIP) was developed to enhance the imprinting effect of a water-soluble template. The hydrophilic macromonomer oligo(ethyleneglycol) methyl ether methacrylate (OEG), bearing a small oligoethylene glycol side chain, was introduced into the MIP matrix in order to achieve good selectivity and less hydrophobic character. In a ternary porogenic system of dimethyl sulfoxide-dimethylformamide-1-butyl-3-methylimidazolium tetrafluoroborate, an imprinted monolithic column with high porosity and good permeability was synthesized using a mixture of gallic acid (template), 4-vinylpyridine (4-VP), ethylene glycol dimethacrylate, and nickel acetate. The effects of some polymerization variables, such as the ratio of OEG/4-VP and the ratio of template to nickel ions, on the imprinting of the resulting MIP monoliths were systematically investigated. The greatest imprinting factor of 11.53 was achieved on the water compatible MIP monolith with optimized polymerization parameters. In addition, Freundlich analyses indicated that the Ni2+-mediated OEG MIP had homogeneous affinity with a heterogeneity index of 0.87, compared with the Ni2+-mediated OEG-free MIP (0.65) and Ni2+-free OEG MIP (0.67).
机译：开发了一种新的基于金属枢轴的分子印迹聚合物（MIP），以增强水溶性模板的印迹效果。将具有小的低聚乙二醇侧链的亲水性大分子低聚（乙二醇）甲基醚甲基丙烯酸甲酯（OEG）引入MIP基质中，以实现良好的选择性和较小的疏水性。在四氟硼酸二甲基亚砜-二甲基甲酰胺-1-丁基-3-甲基咪唑鎓的三元成孔体系中，使用没食子酸（模板），4-乙烯基吡啶（4-VP）的混合物合成了具有高孔隙率和良好渗透性的印迹整体式色谱柱，乙二醇二甲基丙烯酸酯和醋酸镍。系统地研究了一些聚合变量（如OEG / 4-VP的比例以及模板与镍离子的比例）对所得MIP整体结构印迹的影响。在具有最佳聚合参数的水相容性MIP整料上实现了最大的压印因子11.53。此外，Freundlich分析表明，与不含Ni2 +的不含OEG的MIP（0.65）和不含Ni2 +的OEG MIP（0.67）相比，Ni2 +介导的OEG MIP具有均一的亲和力，异质性指数为0.87。

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