2,6-bis(5-(2,2-dimethylpropyl)-1H-pyrazol-3-yl)pyridine as a ligand for efficient actinide(III)/lanthanide(III) separation

• Verfasst von: Bremer, Antje [VerfasserIn]
• Verfasst von: Ruff, Christian [VerfasserIn]
• Verfasst von: Panak, Petra [VerfasserIn]
• Titel: 2,6-bis(5-(2,2-dimethylpropyl)-1H-pyrazol-3-yl)pyridine as a ligand for efficient actinide(III)/lanthanide(III) separation
• Verf.angabe: Antje Bremer, Christian M. Ruff, Denise Girnt, Udo Müllich, Jörg Rothe, Peter W. Roesky, Petra J. Panak, Alexei Karpov, Thomas J. J. Müller, Melissa A. Denecke, and Andreas Geist
• Umfang: 9 S.
• Fussnoten: Published: April 19, 2012 ; Gesehen am 28.06.2018
• Titel Quelle: Enthalten in: Inorganic chemistry
• Jahr Quelle: 2012
• Band/Heft Quelle: 51(2012), 9, S. 5199-5207
• ISSN Quelle: 1520-510X
• DOI: doi:10.1021/ic3000526
• Datenträger: Online-Ressource
• Sprache: eng
• K10plus-PPN: 1576946444

Abstract

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 β3 = 14.8 ± 0.4 determined for the Cm(III) 1:3 complex is in line with C5-BPP’s high distribution ratios for Am(III) observed in extraction experiments.