A TRLFS study on the complexation of Cm(III) and Eu(III) with 4-t-butyl-6,6′-bis-(5,6-diethyl-1,2,4-triazin-3-yl)-2,2′-bipyridine in a water/2-propanol mixture
The complexation of Cm(III) and Eu(III) with 4-t-butyl-6,6′-bis-(5,6-diethyl-1,2,4-triazin-3-yl)-2,2′-bipyridine (t-Bu-C2-BTBP) in water/2-propanol solution is studied. With increasing ligand concentration, 1 : 2 complexes [M(t-Bu-C2-BTBP)2(H2O)]3+ form from the solvated metal ions. The stability co...
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| Main Authors: | , , , , , |
|---|---|
| Format: | Article (Journal) |
| Language: | English |
| Published: |
2010
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| In: |
Dalton transactions
Year: 2010, Volume: 39, Issue: 3, Pages: 923-929 |
| ISSN: | 1477-9234 |
| DOI: | 10.1039/B919247F |
| Online Access: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1039/B919247F Verlag, lizenzpflichtig, Volltext: https://pubs.rsc.org/en/content/articlelanding/2010/dt/b919247f |
| Author Notes: | Sascha Trumm, Georg Lieser, Mark R.S.J. Foreman, Petra J. Panak, Andreas Geist, and Thomas Fanghänel |
MARC
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| 245 | 1 | 2 | |a A TRLFS study on the complexation of Cm(III) and Eu(III) with 4-t-butyl-6,6′-bis-(5,6-diethyl-1,2,4-triazin-3-yl)-2,2′-bipyridine in a water/2-propanol mixture |c Sascha Trumm, Georg Lieser, Mark R.S.J. Foreman, Petra J. Panak, Andreas Geist, and Thomas Fanghänel |
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| 520 | |a The complexation of Cm(III) and Eu(III) with 4-t-butyl-6,6′-bis-(5,6-diethyl-1,2,4-triazin-3-yl)-2,2′-bipyridine (t-Bu-C2-BTBP) in water/2-propanol solution is studied. With increasing ligand concentration, 1 : 2 complexes [M(t-Bu-C2-BTBP)2(H2O)]3+ form from the solvated metal ions. The stability constants are log KCm(III) = 11.1 and log KEu(III) = 9.0. For both Cm(III) and Eu(III), the complexation reaction is both enthalpy and entropy driven. ΔHCm(III) is 11.7 kJ mol−1 more negative than ΔHEu(III), whereas the entropy difference is negligible. This is in good agreement with t-Bu-C2-BTBP's selectivity in liquid-liquid extraction. | ||
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