Appended corrole manganese complexes:Catalysis and axial-ligand effect

作     者：Nga-Chun Ng Mian HR Mahmood Chi-K.Chang Hai-Yang Liu Fei Yam Lam-Lung Yeung 

作者机构：Department of Chemistry and Open Laboratory of Chemical Biology of the Institute of Molecular Technology for Drug Discovery and SynthesisHong Kong University of Science and Technology Department of ChemistrySouth China University of Technology Department of ChemistryMichigan State University Chi-K.Changa 

出 版 物：《Chinese Chemical Letters》 (中国化学快报（英文版）)

年 卷 期：2014年第25卷第4期

页      面：571-574页

核心收录：

学科分类：081705[工学-工业催化] 08[工学] 0817[工学-化学工程与技术] 

基　　金：supported by National Natural Science Foundation of China(Nos.21171057,21371059) Research Grant Councilof Hong Kong under project HKUST6182/99p Area of Excellence Scheme(No.AoE/P-10/01) 

主　　题：Manganese Corrole Catalysis Axial ligand Oxygen atom transfer 

摘      要：A series of N-base appended corroles and their manganese complexes were synthesized and their binding constants with three different nitrogenous ligands, triethylamine, N-methylimidazole and pyridine, were evaluated by spectroscopy. Kinetic studies indicated that the presence of appended N- donor ligands may cause a significant enhancement of the rate of oxygen atom transfers （OAT） from （oxo）manganese（V） corrole to alkene, and the stronger axial ligand binding has impact on the rate of the oxidation reaction. Turnover frequency （TOF） for the catalytic oxidation of alkenes by appended manganese corroles varies with the following ligand order： acetamido 〈 pyridyl 〈 imidazolyl. The influence of the external axial ligands on the catalytic epoxidation was investigated by using appended acetamido manganese corrole as catalyst, with the results revealing that N-methylimidazole gave the best enhancement on the yields of total oxidation products among the investigated nitrogenous ligands.