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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 shu

Ligand Exchange Reactions of Lanthanide Complexes with Nitrilotriacetate Ln(NTA)₂ by ¹³C and ¹H NMR

1.
Changchun Institute of Applied Chemistry,Changchun 130022

Received Date: 2 April 1993
Available Online: 15 September 1994

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.
- Nitrilotriacetate,
- Lanthanide cmplex,
- NMR
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Ligand Exchange Reactions of Lanthanide Complexes with Nitrilotriacetate Ln(NTA)2 by 13C and 1H NMR

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通讯作者: 陈斌, bchen63@163.com

Ligand Exchange Reactions of Lanthanide Complexes with Nitrilotriacetate Ln(NTA)₂ by ¹³C and ¹H NMR