三乙醇胺-Co(Ⅱ)金属胶束催化4-硝基苯酚乙酸酯水解反应  

Hydrolysis of 4-nitrophenyl acetate catalyzed by triethanolamine-Co(Ⅱ) metallomicelles

作　　者：聂丽[1] 罗东丽[1] 张元勤[1] 

机构地区：[1]乐山师范学院化学与生命科学学院,四川乐山614004

出　　处：《化学研究与应用》2008年第12期1565-1569,共5页Chemical Research and Application

基　　金：四川省教育厅重点实验资助项目(07ZS005);乐山市科技局资助项目;四川省学术和技术带头人培养资金资助项目

摘　　要：本文分别研究了在有和无CTAB及Triton x-100两种表面活性剂存在时,三乙醇胺-Co(Ⅱ)配合物催化4-硝基苯酚乙酸酯(PNPA)水解反应动力学,实验结果表明,三乙醇胺-Co(Ⅱ)配合物对PNPA水解有较强的催化作用,与金属配合物键合的水分子离解所产生的活性物种ML-OH-是金属配合物催化水解PNPA的主要因素。表面活性剂胶束的存在对金属配合物催化水解PNPA有加速作用,这种加速作用主要是由于胶束的存在增大了与配合物键合的水分子的酸离解常数,从而使活性物种的数量增加所致。建立了催化反应的动力学数学模型,获得了催化反应相关的热力学和动力学参数。The hydrolysis of 4-nitrophenyl acetate catalyzed by triethanolamine-Co （Ⅱ ） complex in the absence and presence of CTAB and Triton x-100 surfactants was studied in this paper. The experimental results indicated that the triethanolamine-Co（ Ⅱ ） complex strongly catalyzed the hydrolysis of 4-nitrophenyl acetate. The micelles of surfactants accelerated the catalysis reaction. The catalytic mechanism was proposed and the kinetic mathematical model of the catalytic reaction for obtaining the thermodynamic and kinetic parameters was also developed according to the mechanism.

关 键 词：金属配合物 金属胶束催化 水解 动力学数学模型 4-硝基苯酚乙酸酯 

分 类 号：O643.321[理学—物理化学]