M（NTEA）配合物的NMR研究  

NMR STUDIES OF M(NTEA) COMPLEXES IN AQUEOUS SOLUTION

作　　者：张善荣[1] 任吉民[1] 刘启民[1] 裴奉奎[1] 倪嘉缵[1] 

机构地区：[1]中国科学院长春应用化学研究所,应用谱学开放实验室

出　　处：《无机化学学报》1995年第4期351-354,共4页Chinese Journal of Inorganic Chemistry

基　　金：国家自然科学基金

摘　　要：用ＮＭＲ方法研究了氨三乙氧基乙酸（ＮＴＥＡ）的质子解离过程及其与Ｌａ３＋、Ｙ３＋、Ｌｕ３＋和Ｃａ２＋的配合作用．ＮＴＥＡ的氮原子和羧基的质子解离常数分别为８．８和３．０．当ｐＨ＞３．０时，Ｌａ３＋、Ｙ３＋和Ｌｕ３＋配合物能稳定形成（＞５０％），而Ｃａ２＋配合物则需出＞５．在ｐＨ３～６范围内，配合物与配体间的交换反应处于慢－中介交换速率区间，通过变温谱模拟得到了其交换反应的动力学参数．he proton dissociation proccsses of nitrilotricthanolacctate acid (NTEA) and its complexes with La3+, Y3+, Lu3+ and Ca2+ had been studied by using NMR spectroscopy. The proton dissociation constants arc 8.8 and 3.0 for amino and carboxyls respectively. The suitable pH range for complex formations is PH > 3 for La3+, Y3+ and Lu3+, while is PH > 5 for Ca2+. The intermolccular ligand exchanges are in the range of slow to intermediate rates on 400MHzNMR time seale, which kinetic parameters are obtained by the simulations of VT 1H NMR spectra

关 键 词：NMR 氨三乙氧基乙酸 配合物 稀土 钙 

分 类 号：O641.4[理学—物理化学] O641.133[理学—化学]