p-Nitrophenyl Picolinate Cleavage by Unsymmetrical Bis-Schiff Base Manganese（Ⅲ） and Cobalt（Ⅱ） Complexes with Aza-Crown Ether or Morpholino Pendants

作     者：Li, Jianzhang He, Xiyang Wang, Ying Zhang, Jin Hu, Wei Qin, Shengying 

作者机构：Key Laboratory of Green Catalysis of Higher Education Institutes of Sichuan School of Chemistry and Pharma- ceutical Engineering Sichuan University of Science ＆ Engineering Zigong Sichuan 643000 China Department of Chemistry and Environment Science Chongqing University of Arts and Science Yongchuan Chongqing 402160 China Department of Chemistry Sichuan University Chengdu Sichuan 610064 China 

出 版 物：《Chinese Journal of Chemistry》 (中国化学（英文版）)

年 卷 期：2011年第29卷第9期

页      面：1894-1900页

核心收录：

学科分类：081704[工学-应用化学] 07[理学] 08[工学] 0817[工学-化学工程与技术] 070303[理学-有机化学] 0703[理学-化学] 070301[理学-无机化学] 

基　　金：the National Natural Science Foundation of Chnia The Opening Project of Key Laboratory of Green Catalysis of Sichuan Institutes of High Education The Specialized Research Fund for the Doctoral Program of Sichuan University of Science and Engineering 

主　　题：benzo-10-aza-crown ether unsymmetrical bis-Schiff base complexes hydrolysis p-nitrophenyl pi-colinate kinetics 

摘      要：The unsymmetrical bis-Schiff base manganese（III） and cobalt（II） complexes with either benzo-10-aza-crown ether pendants （MnL1Cl, MnLZCl） or morpholino pendant （MnL3Cl, CoL3） have been employed as models for hy- drolase by studying the kinetics of their hydrolysis reactions with p-nitrophenyl picolinate （PNPP）. A kinetic model of PNPP cleavage catalyzed by these complexes is proposed. The effects of complex structures and reaction temperature on the rate of PNPP hydrolysis have been examined. All four complexes exhibit high catalytic activity and the rate increases with pH under 25℃. The complexes of ligands containing a crown ether group exhibit higher catalytic activities than the non-crown analogues. The catalytic activity of the complexes follows the order Mn（III） 〉 Co（II） under the same ligands.