Cobalt(II) Salen Complex with Two Aza-crown Pendants and Its Analogues as Synthetic Oxygen Carriers  

作　　者：魏星跃 李建章 毛治华 周波 秦圣英 

机构地区：[1]Department of Chemistry, Sichuan University, Chengdu, Sichuan 610064, China [2]Analytical and Testing Center, Sichuan University, Chengdu, Sichuan 610064, China

出　　处：《Chinese Journal of Chemistry》2004年第6期558-562,501,共5页中国化学（英文版）

基　　金：Project supported by the National Natural Science Foundation of China (Nos. 29572050 and 20072025).

摘　　要：Salen with two aza-crown ether pendants H2L1 and its analogues H2L2--H2L4 were successfully synthesized starting from benzo-10-aza-15-crown-5 (BN15C5) or morpholine. Their structures were characterized by IR, MS, H-1 NMR and elemental analysis, and were confirmed by X-ray diffraction analysis of H2L1. Moreover, the saturated oxygen uptake of their cobalt(II) complexes CoL1-CoL4 in diethyleneglycol dimethyl ether was determined at different temperature. The oxygenation contants ( K-O2) and thermodynamic parameters (DeltaHdegrees and DeltaSdegrees) were calculated. The modulation of O-2-binding capabilities by pendant substituents were investigated as compared with the parent Schiff base complex CoL5 (CoSalen). The results indicate that the dioxygen affinities of CoL have been much more enhanced by aza-crown pendants than that by morpholino pendants, and the O-2-binding capabilities of CoL1 and CoL2 with aza-crown pendants would also be enhanced by adding alkali metal cations.Salen with two aza-crown ether pendants H2L1 and its analogues H2L2--H2L4 were successfully synthesized starting from benzo-10-aza-15-crown-5 (BN15C5) or morpholine. Their structures were characterized by IR, MS, H-1 NMR and elemental analysis, and were confirmed by X-ray diffraction analysis of H2L1. Moreover, the saturated oxygen uptake of their cobalt(II) complexes CoL1-CoL4 in diethyleneglycol dimethyl ether was determined at different temperature. The oxygenation contants ( K-O2) and thermodynamic parameters (DeltaHdegrees and DeltaSdegrees) were calculated. The modulation of O-2-binding capabilities by pendant substituents were investigated as compared with the parent Schiff base complex CoL5 (CoSalen). The results indicate that the dioxygen affinities of CoL have been much more enhanced by aza-crown pendants than that by morpholino pendants, and the O-2-binding capabilities of CoL1 and CoL2 with aza-crown pendants would also be enhanced by adding alkali metal cations.

关 键 词：benzo-10-aza-15-crown-5 bis-Schiff base transition-metal complex synthesis OXYGENATION alkali metal ion 

分 类 号：O614[理学—无机化学]