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新型金属胶束模拟酶对羧酸酯与磷酸酯的催化水解 总被引:6,自引:1,他引:6
报道了三种新的含醇羟基、胺基或咪唑基长链配体与铜锌离子构成的金属胶束对几种羧酸酯与磷酸酯底物催化水解动力学。结果表明,设计的金属胶束N-十四烷基-2-(N-2'-羟乙基氨基甲基)咪唑锌铜(2a,2b)在共胶束CTAB(溴化十六烷基三甲铵)存在下,对强配位羧酸酯对硝基苯酚-2-吡啶甲酸酯具有很强的催化水解能力,对磷酸酯对硫磷具有很高的反应性,2a,2b的醇羟基参与了对弱配位底物羧酸酯及磷酸酯的进攻,对不同电荷性质的羧酸酯底物具有较强的静电选择性。 相似文献
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A series of modified polyethylenimines (PEIs) containing oxime groups and cetyl groups were prepared. The dissociated constants of oxime group and the rate constants of its reaction with p-nitrophenyl diphenyl phosphate (PNPDPP) were determined. These polymers are good catalysts for the cleavage of PNPDPP under aqueous conditions. Rate accelerations approach 10~4-10~5-fold level with turnover behavior. Reaction mechanism is analogous to that of enzyme-catalyzed kinetics. 相似文献
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