Dioxygen affinities and catalytic oxidation performance of cobalt(Ⅱ) hydroxamates with benzo-15-crown-5 pendants  

作　　者：Hong Bo Li Chuan Qin Wen Bing Yang Xiao Ping Hu Sheng Ying Qin 

机构地区：[1]College of Material Science and Engineering, Southwest University of Science and Technology, Mianyang 621010, China [2]Department of Chemistry, Sichuan University, Chengdu 610064, China

出　　处：《Chinese Chemical Letters》2007年第1期103-106,共4页中国化学快报（英文版）

基　　金：The authors gratefully acknowledge the grants from the National Natural Science Foundation of China(No.20072025);Education 0ffice Foundation of Sichuan Province(No.2005C012);Sichuan Provincial Department of Science&Technology(No.2006J13-143)in support of this work.

摘　　要：The oxygenation constants （Ko2） of cobalt（Ⅱ） hydroxamates （CoL^1 2-CoL^3 2） with benzo-15-crown-5 （B15C5） pendants were measured over the range of -5 to ＋20 ℃, and the values of thermodynamic parameters （ΔH^0 and ΔS^0） were calculated based on these （Ko2） values, Meanwhile, these crowned complexes were employed to the oxidation for p-xylene to p-toluic acid with air at 110Δ under normal atmospheric pressure. The effects of B15C5 pendant and the length of chain bonded to B15C5 in these complexes on the O2-binding capabilities and oxidation for p-xylene were investigated with the comparison of crown-free analogues CoL^4 2.The oxygenation constants （Ko2） of cobalt（Ⅱ） hydroxamates （CoL^1 2-CoL^3 2） with benzo-15-crown-5 （B15C5） pendants were measured over the range of -5 to ＋20 ℃, and the values of thermodynamic parameters （ΔH^0 and ΔS^0） were calculated based on these （Ko2） values, Meanwhile, these crowned complexes were employed to the oxidation for p-xylene to p-toluic acid with air at 110Δ under normal atmospheric pressure. The effects of B15C5 pendant and the length of chain bonded to B15C5 in these complexes on the O2-binding capabilities and oxidation for p-xylene were investigated with the comparison of crown-free analogues CoL^4 2.

关 键 词：Benzo-15-crown-5 Cobalt（Ⅱ） hydroxamates Dioxygen affinity Catalytic oxidation p-Xylene 

分 类 号：O641.4[理学—物理化学]