| 聚醚桥连二异羟肟酸单核和双核过渡金属配合物催化PNPP水解 |
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| 引用本文： | 李建章,李鸿波,冯发美,谢家庆,李慎新,周波,秦圣英.聚醚桥连二异羟肟酸单核和双核过渡金属配合物催化PNPP水解[J].中国化学,2005,23(6):678-684. |
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| 作者姓名： | 李建章 李鸿波 冯发美 谢家庆 李慎新 周波 秦圣英 |
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| 作者单位： | [1]DepartmentofChemistry,SichuanUniversityofScienceandEngineering,Zigong,Sichuan643000,China [2]DepartmentofChemistry,SichuanUniversity,Chengdu,Sichuan610064,China |
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| 摘 要： | Two polyether bridged dihydroxamic acids and their mono-and binuclear manganese(Ⅱ), zinc(Ⅱ) complexes have been synthesized and employed as models to mimic hydrolase in catalytic hydrolysis of p-nitrophenyl picolinate (PNPP). The reaction kinetics and the mechanism of hydrolysis of PNPP have been investigated. The kinetic mathematical model for PNPP cleaved by the complexes has been proposed. The effects of the different central metal ion, mono-and binuclear metal, the pseudo-macrocyclic polyether constructed by polyethoxy group of the complexes, and reactive temperature on the rate for catalytic hydrolysis of PNPP have been examined. The results showed that the transition metal dthydroxamates exhibited high catalytic activity to the hydrolysis of PNPP, the catalytic activity of binuclear complexes was higher than that of mononuclear ones, and the pseudo-macrocyclic polyether might synergetically activate H20 coordinated to metal ion with central metal ion together and promote the catalytic hydrolysis of PNPP.
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| 关 键 词： | 二羟基酰胺酸 聚醚 金属化合物 水解反应 P-硝基苯 催化反应 |
| 收稿时间： | 2004-6-11 |
| 修稿时间： | 2005-2-1 |
Hydrolysis of p‐Nitrophenyl Picolinate Catalyzed by Mono‐ and Binuclear Transition Metal Complexes with Polyether Bridged Dihydroxamic Acid |
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| Li Jian‐Zhang,Li Hong‐Bo,Feng Fa‐Mei,Xie Jia‐Qing,Li Shen‐Xin,Zhou Bo,Qin Sheng‐Ying.Hydrolysis of p‐Nitrophenyl Picolinate Catalyzed by Mono‐ and Binuclear Transition Metal Complexes with Polyether Bridged Dihydroxamic Acid[J].Chinese Journal of Chemistry,2005,23(6):678-684. |
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| Authors: | Li Jian‐Zhang Li Hong‐Bo Feng Fa‐Mei Xie Jia‐Qing Li Shen‐Xin Zhou Bo Qin Sheng‐Ying |
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| Abstract: | Two polyether bridged dihydroxamic acids and their mono‐ and binuclear manganese(II), zinc(II) complexes have been synthesized and employed as models to mimic hydrolase in catalytic hydrolysis of p‐nitrophenyl picolinate (PNPP). The reaction kinetics and the mechanism of hydrolysis of PNPP have been investigated. The kinetic mathematical model for PNPP cleaved by the complexes has been proposed. The effects of the different central metal ion, mono‐ and binuclear metal, the pseudo‐macrocyclic polyether constructed by polyethoxy group of the complexes, and reactive temperature on the rate for catalytic hydrolysis of PNPP have been examined. The results showed that the transition metal dihydroxamates exhibited high catalytic activity to the hydrolysis of PNPP, the catalytic activity of binuclear complexes was higher than that of mononuclear ones, and the pseudo‐macrocyclic polyether might synergetically activate H2O coordinated to metal ion with central metal ion together and promote the catalytic hydrolysis of PNPP. |
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| Keywords: | dihydroxamic acid transition metal complex mimic hydrolase catalytic kinetics p‐nitrophenyl picolinate |
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