In this work, the commercial polymer poly(ethylene-alt-maleic anhydride) was used as a platform for the preparation of an imidazole-rich polymeric catalyst (PEIIm) designed for organophosphate degradation. The catalyst was prepared at gram-scale using simple and cost-effective steps and was characterized by ¹H NMR, IR, CHN and TGA. PEIIm showed higher activity than the free imidazole towards the degradation of diethyl 2,4-dinitrophenylphosphate, an organophosphate model, and was recovered by centrifugation and reused without loss of activity. Importantly, experiments performed under excess of substrate demonstrate that true catalysis takes place. Solvent kinetic isotope effect indicates that the pendant imidazole groups attack the phosphorus atom to form a phosphorylated polymeric intermediate that is rapidly hydrolyzed, allowing for the catalyst regeneration. PEIIm was also employed in the degradation of toxic pesticide ethyl paraoxon, resulting in a reduction in its half-life from 780 days to 25 days at 25 °C, pH 8.0.

在这项工作中，商业聚合物聚（乙烯- ALT -马来酸酐）用作设计用于有机磷酸盐降解的富含咪唑聚合催化剂（PEIIm）的制备的平台。该催化剂使用简单且经济高效的步骤以克为单位制备，其特征在于¹1 H NMR，IR，CHN和TGA。PEIIm对2,4-二硝基苯基磷酸二乙酯（一种有机磷酸酯模型）的降解显示出比游离咪唑更高的活性，并通过离心回收，可以再次使用而不会损失活性。重要的是，在过量的底物下进行的实验表明发生了真正的催化作用。溶剂动力学同位素效应表明，咪唑侧基攻击磷原子，形成磷酸化的聚合物中间体，该中间体迅速水解，从而使催化剂再生。PEIIm还用于降解有毒农药乙基对氧磷，导致其半衰期在25°C（pH 8.0）下从780天减少到25天。