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三乙醇胺-Ce(Ⅲ)金属配合物催化水解双(对硝基苯酚)磷酸酯研究 被引量:1

A Study of the hydrolysis of Bis(4-nitrophenyl)phosphate Catalyzed by Triethanolamine-Ce(Ⅲ) Complex
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摘要 在30℃和pH8.0的条件下,研究了三乙醇胺与Ce(Ⅲ)形成的金属配合物对双(对硝基苯酚)磷酸酯(BNPP)的催化水解作用,实验发现,该金属配合物对BNPP有高效快速的催化水解作用,在pH8.0时,其水解的表观一级速率常数为1.42×10-2s-1,为BNPP自发水解的1.27×109倍,接近于天然酶的活性水平.提出了催化反应的机理,建立了催化反应的动力学数学模型,获得了相关的热力学和动力学参数. The hydrolysis of bis (4-nitrophenyl) phosphate (BNPP) catalyzed by triethanolamine-Ce ( Ⅲ ) complex was studied at 30℃ and pH8.0 in this paper. The experimental results indicate that triethanolamine-Ce (Ⅲ) complex dramatically accelerates the hydrolysis of BNPP. The observed first order rate constant of the hydrolysis of BNPP catalyzed by triethanolarnine-Ce( Ⅲ ) is 1.42 × 10^-3 s^-1, which is 1.27 × 109 times of that of spontaneous hydrolysis of BNPP at pH7. The catatalytic mechanism was proposed in this paper and the kinetic mathematical model of the catalytic reaction was also developed according to the mechanism.
作者 聂丽 张元勤
出处 《四川大学学报(自然科学版)》 CAS CSCD 北大核心 2005年第6期1219-1223,共5页 Journal of Sichuan University(Natural Science Edition)
基金 四川省科技厅应用基础研究资助课题(01GY051-63) 四川省教育厅重点资助课题
关键词 金属配合物 磷酸酯 水解 动力学 metal complex organic phosphate hydrolysis chemical kinetics
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参考文献23

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