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| Hauptseite > Publikationsdatenbank > 6-(6-Methyl-1,2,4,5-Tetrazine-3-yl)-2,2′-Bipyridine: A N-Donor Ligand for the Separation of Lanthanides(III) and Actinides(III) > print |
| Hauptseite > Publikationsdatenbank > 6-(6-Methyl-1,2,4,5-Tetrazine-3-yl)-2,2′-Bipyridine: A N-Donor Ligand for the Separation of Lanthanides(III) and Actinides(III) > print |
| 001 | 1029558 | ||
| 005 | 20250203133156.0 | ||
| 024 | 7 | _ | |a 10.1021/acs.inorgchem.4c01793 |2 doi |
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| 100 | 1 | _ | |a Greif, Gerlinde |0 P:(DE-HGF)0 |b 0 |e First author |
| 245 | _ | _ | |a 6-(6-Methyl-1,2,4,5-Tetrazine-3-yl)-2,2′-Bipyridine: A N-Donor Ligand for the Separation of Lanthanides(III) and Actinides(III) |
| 260 | _ | _ | |a Washington, DC |c 2024 |b American Chemical Society |
| 336 | 7 | _ | |a article |2 DRIVER |
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| 520 | _ | _ | |a Here, we report the synthesis of the 6-(6-methyl-1,2,4,5-tetrazine-3-yl)-2,2′-bipyridine (MTB) ligand that has been developed for lanthanide/actinide separation. A multimethod study of the complexation of MTB with trivalent actinide and lanthanide ions is presented. Single-crystal X-ray diffraction measurements reveal the formation of [Ce(MTB)2(NO3)3], [Pr(MTB)(NO3)3H2O], and [Ln(MTB)(NO3)3MeCN] (Ln = Nd, Sm, Eu, Gd). In addition, the complexation of Cm(III) with MTB in solution was studied by time-resolved laser fluorescence spectroscopy. The results show the formation of [Cm(MTB)1–3]3+ complexes, which occur in two different isomers. Quantum chemical calculations reveal an energy difference between these isomers of 12 kJ mol–1, clarifying the initial observations made by time-resolved laser fluorescence spectroscopy (TRLFS). Furthermore, quantum theory of atoms in molecules (QTAIM) analysis of the Cm(III) and Ln(III) complexes was performed, indicating a stronger covalent contribution in the Cm–N interaction compared to the respective Ln–N interaction. These findings align well with extraction data showing a preferred extraction of Am and Cm over lanthanides (e.g., max. SFAm/Eu = 8.3) at nitric acid concentrations <0.1 mol L–1 HNO3. |
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