2,6-Bis(5-(2,2-dimethylpropyl)-1H-pyrazol-3-yl)pyridine as a Ligand for Efficient Actinide(III)/Lanthanide(III) Separation

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• 作者：Antje Bremer ; Christian M. Ruff ; Denise Girnt ; Udo M眉llich ; J枚rg Rothe ; Peter W. Roesky ; Petra J. Panak ; Alexei Karpov ; Thomas J. J. M眉ller ; Melissa A. Denecke ; Andreas Geist
• 刊名：Inorganic Chemistry
• 出版年：2012
• 出版时间：May 7, 2012
• 年：2012
• 卷：51
• 期：9
• 页码：5199-5207
• 全文大小：456K
• 年卷期：v.51,no.9(May 7, 2012)
• ISSN：1520-510X

文摘

The N-donor complexing ligand 2,6-bis(5-(2,2-dimethylpropyl)-1H-pyrazol-3-yl)pyridine (C5-BPP) was synthesized and screened as an extracting agent selective for trivalent actinide cations over lanthanides. C5-BPP extracts Am(III) from up to 1 mol/L HNO₃ with a separation factor over Eu(III) of approximately 100. Due to its good performance as an extracting agent, the complexation of trivalent actinides and lanthanides with C5-BPP was studied. The solid-state compounds [Ln(C5-BPP)(NO₃)₃(DMF)] (Ln = Sm(III), Eu(III)) were synthesized, fully characterized, and compared to the solution structure of the Am(III) 1:1 complex [Am(C5-BPP)(NO₃)₃]. The high stability constant of log 尾₃ = 14.8 卤 0.4 determined for the Cm(III) 1:3 complex is in line with C5-BPP鈥檚 high distribution ratios for Am(III) observed in extraction experiments.