含吡啶咪唑单配基螯合树脂的性能与结构表征

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 王玮 WANG Wei 1 first-author 李星 LI Xing 1 束怡 SHU Yi 1 夏亚子 XIA Yazi 1 刘立琼 LI Liqiong 1 束家有 SHU Jiayou 1 武汉大学药学院 武汉大学药学院 College of Pharmacy,Wuhan University College of Pharmacy,Wuhan University 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. 螯合树脂 环氧化物骨架 金属离子配合 chelate resin matrix of epoxide polymer-type metal uptake 10.14188/j.1671-8836.2010.03.007 TQ320.7 武汉市科技计划项目（2008600573411） 2010-03-01 2021-04-01 3 56