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

作者：Bremer Antje; Ruff Christian M; Girnt Denise; Muellich Udo; Rothe Joerg; Roesky Peter W^*; Panak Petra J; Karpov Alexei; Mueller Thomas J J; Denecke Melissa A; Geist Andreas

来源：Inorganic Chemistry, 2012, 51(9): 5199-5207.

DOI：10.1021/ic3000526

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 beta(3) = 14.8 +/- 0.4 determined for the Cm(III) 1:3 complex is in line with C5-BPP%26apos;s high distribution ratios for Am(III) observed in extraction experiments.

• 出版日期2012-5-7