含吡啶咪唑单配基螯合树脂的性能与结构表征  

Synthesis,Characterization,Metal-Uptake Behavior of Resin Containing Single Ligand Supported on Epoxide Polymer

作　　者：王玮[1] 李星[1] 束怡[1] 夏亚子[1] 刘立琼[1] 束家有[1] 

机构地区：[1]武汉大学药学院,湖北武汉430072

出　　处：《武汉大学学报（理学版）》2010年第3期284-288,共5页Journal of Wuhan University:Natural Science Edition

基　　金：武汉市科技计划项目(2008600573411)

摘　　要：用一步共缩聚法合成了以环氧聚合物为基质的苯并咪唑、吡啶单配基螯合树脂,用核磁共振碳谱13C NMR和红外光谱（IR）测定了单配基螯合树脂的结构,并研究了其配位机制.在pH 1.0~6.0的缓冲溶液中用原子吸收法测定该类螯合树脂对Cu2＋,Ni2＋,Zn2＋,Cd2＋和Co2＋氯化物的配合容量,螯合树脂的配基含量达到2.47~3.10 mmol.g-1;氨甲基吡啶螯合树脂（MAMPE）在pH 5.0对Cu2＋有很好的选择性,最高配合容量为1.67mmol.g-1,半程配合时间t1/2=7 min;苯并咪唑螯合树脂（AMBME）在pH 2.0介质中选择性配合Cd2＋,配合容量为0.75 mmol.g-1,并具有反向pH依从特性.Cu2＋树脂顺磁共振波谱（EPR）表征和配位场研究结果初步证明树脂表面配合物为四面体配位结构.Three novel chelating resins including different functional groups,such as benzimidazole,aminopyridine,aminomethylpridine,were synthesized.The chelating resins,prepared in one-step,were characterized by 13C NMR and infrared spectroscopy（IR）,and the coordination mechanism was studied.In pH 1.0-6.0 buffer solution,the ligand contents of the chelating resins for Cu2＋,Ni2＋,Zn2＋,Cd2＋ and Co2＋ were determined to be in the range of 2.47-3.10 mmol·g-1.MAMPE was selective for Cu2＋ at pH 5.0 under non-competitive condition,and the maximum uptake capacity was found to be 1.67 mmol·g-1;half uptake time was 7 min.The selective uptake capacity of Cd2＋ by AMBME was 0.75 mmol/g at pH 2.0,and it changed with contrary pH dependence.The electron paramagnetic resonance（EPR） of Cu2＋ resin and the results of ligand field proved that the structure of resin＇s surface complex was tetrahedral.

关 键 词：螯合树脂 环氧化物骨架 金属离子配合 

分 类 号：R914[医药卫生—药物化学]