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Reflux precipitation polymerization: a new synthetic insight in molecular imprinting at high temperature

机译：回流沉淀聚合：在高温下进行分子印迹的新型合成洞察

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The synthesis of uniform molecularly imprinted polymer (MIP) microspheres (MSs) using distillation precipitation polymerization (DPP) at high temperature has attracted great interest in the field of molecular imprinting. However, there are still some shortcomings in this method. In this work, to create uniform MIP MSs in a short time and to demonstrate the effects of high temperature on imprinting performance, a new precipitation polymerization method (reflux precipitation polymerization, RPP) was used for the first time to fabricate MIP MSs in this study. The SEM images of the polymeric MSs indicate the presence of template molecules could improve the particle morphology and size uniformity. The specific molecular recognition of the monodispersed MIP MSs was confirmed by fluorescence measurement and HPLC-UV analysis. The binding behavior of the MIP MSs was simulated using the heterogeneous Freundlich isotherm, which shows that the MIP MSs produced by the RPP possess compatible selectivity in comparison with those produced by traditional PP method. It is noted that, for the first time, we demonstrated that molecular imprinting at high temperature was only successful when electrostatic interactions played important roles in the imprinting process.
机译：在高温下使用蒸馏沉淀聚合（DPP）的均匀分子印迹聚合物（MIP）微球（MS）的合成引起了对分子印迹领域的兴趣。但是，这种方法仍然存在一些缺点。在这项工作中，在短时间内创建均匀的MIP MSS并证明高温对压印性能的影响，首次使用新的沉淀聚合方法（回流沉淀聚合，RPP）来制造本研究中的MIP MS。 。聚合物MS的SEM图像表示模板分子的存在可以改善颗粒形态和尺寸均匀性。通过荧光测量和HPLC-UV分析证实了单分散的MIP MS的特定分子识别。使用异质的Freundlich等温线模拟MIP MS的结合行为，其表明通过RPP产生的MIP MSS与通过传统PP方法产生的那些相比具有相容的选择性。值得注意的是，首次证明了在静电相互作用在压印过程中起重要作用时，在高温下的分子印迹才是成功的。

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