引用本文:
任吉民, 景凤英, 裴奉奎, 王文韵, 倪嘉缵. 氨三乙酸稀土络合物配体交换反应的NMR研究[J]. 物理化学学报,
1994, 10(09): 785-789.
doi:
10.3866/PKU.WHXB19940904
Citation: Ren Ji-Min, Jing Feng-Ying, Pei Feng-Kui, Wang Wen-Yun, Ni Jia-Zuan. Ligand Exchange Reactions of Lanthanide Complexes with Nitrilotriacetate Ln(NTA)2 by 13C and 1H NMR[J]. Acta Physico-Chimica Sinica, 1994, 10(09): 785-789. doi: 10.3866/PKU.WHXB19940904
Citation: Ren Ji-Min, Jing Feng-Ying, Pei Feng-Kui, Wang Wen-Yun, Ni Jia-Zuan. Ligand Exchange Reactions of Lanthanide Complexes with Nitrilotriacetate Ln(NTA)2 by 13C and 1H NMR[J]. Acta Physico-Chimica Sinica, 1994, 10(09): 785-789. doi: 10.3866/PKU.WHXB19940904
氨三乙酸稀土络合物配体交换反应的NMR研究
English
Ligand Exchange Reactions of Lanthanide Complexes with Nitrilotriacetate Ln(NTA)2 by 13C and 1H NMR
Abstract:
Ligand exchange reactions were studied by VT 13C and 1H NMR for lanthanide complexes with nitrilotriacetate Ln(NTA)2 in neutral aqueous solution in the presence of an excess of ligand (Ln=Ce, Pr and Nd). The intermolecular ligand exchange occurs by the following mechanism
Ln（NTA）23- ×H*NTA2-↔ Ln（*NTA）（NTA）3+ + HNTA2-
The exchange rates were analysed from the line-width values of free NTA and it is found that the activation energy values of the ligand exchange are related to the thermodynamic stability of the corresponding lanthanide complexes with NTA.
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Key words:
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Nitrilotriacetate
- / Lanthanide cmplex
- / NMR
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