金属胶束催化:单核配合物催化α-吡啶甲酸对硝基苯酚酯水解反应动力学  

Catalytic Hydrolysis of P-nitrophenyl Picolinate(PNPP) by Cu(II) Complex in Micellar Solution

作　　者：蒋维东[1] 向庆华[2] 蒋炳英[1] 相艳[1] 曾宪诚[1] 

机构地区：[1]四川大学化学学院,成都610064 [2]自贡师范高等专科学校,四川自贡643000

出　　处：《四川大学学报（自然科学版）》2003年第4期732-735,共4页Journal of Sichuan University(Natural Science Edition)

基　　金：国家自然科学基金资助项目(29873031)

摘　　要：实验合成了单核配合物4 氯 2,6 二(N 羟已基氨基甲基)苯酚合铜,研究了不同pH条件下在不同的3种表面活性剂(CTAB,LSS,Brij35)所生成的胶束溶液中催化PNPP水解的动力学 结果表明,阳离子表面活性剂(CTAB)加快了PNPP的水解,两性离子表面活性剂(LSS)对反应先催化后抑制,而非离子表面活性剂(Brij35)则抑制了反应的进行 用三元复合物模型进行动力学处理。The hydrolysis of pnitrophenyl picolinate (PNPP) catalyzed by the Cu(II) complex of 4chloride2,6bis(Nhydroxyethylaminomethyl)benzophenol was investigated kinetically in the presence of three surfactants, which are hexadecyltrimethylammonium bromide, nlauroylsarcosine sodiumand polyoxyethylene(23) lauryl ether respectively, at different pH and 250C. The kinetic model involving a ternary complex contained ligand, metal ion and substrate in micelle was established and the related kinetic and thermodynamic parameters were obtained, such as firstorder rate constant (kN), association constant (Ks) for ternary complex. The reaction mechanism was discussed.

关 键 词：单核配合物 表面活性剂 PNPP的水解 三元复合物动力学模型 

分 类 号：O643[理学—物理化学]