A TRLFS study on the complexation of CmIII and EuIII with 2,6-Bis(5,6-dipropyl-1,2,4-triazin-3-yl)pyridine in water/methanol mixture

• Verfasst von: Trumm, Sascha [VerfasserIn]
• Verfasst von: Panak, Petra [VerfasserIn]
• Verfasst von: Geist, Andreas [VerfasserIn]
• Verfasst von: Fanghänel, Thomas [VerfasserIn]
• Titel: A TRLFS study on the complexation of CmIII and EuIII with 2,6-Bis(5,6-dipropyl-1,2,4-triazin-3-yl)pyridine in water/methanol mixture
• Verf.angabe: Sascha Trumm, Petra J. Panak, Andreas Geist, and Thomas Fanghänel
• E-Jahr: 2010
• Jahr: 23 June 2010
• Umfang: 7 S.
• Fussnoten: Gesehen am 19.01.2024 ; Im Titel ist "III" nach Cm und Eu hochgestellt
• Titel Quelle: Enthalten in: European journal of inorganic chemistry
• Ort Quelle: Weinheim : Wiley-VCH, 1998
• Jahr Quelle: 2010
• Band/Heft Quelle: (2010), 19, Seite 3022-3028
• ISSN Quelle: 1099-0682
• DOI: doi:10.1002/ejic.201000230
• Datenträger: Online-Ressource
• Sprache: eng
• Sach-SW: Actinides
• Sach-SW: Fluo­rescence spectroscopy
• Sach-SW: Lanthanides
• Sach-SW: Partitioning
• Sach-SW: Thermodynamics
• K10plus-PPN: 1878478222

Abstract

The complexation of CmIII and EuIII with 2,6-bis(5,6-dipropyl-1,2,4-triazin-3-yl)pyridine (nPr-BTP) in water/methanol solution is studied. 1:3 complexes [M(nPr-BTP)3]3+ form from the solvated metal ions upon addition of ligand. The conditional stability constants are log K = 14.4 and log K = 11.9. For both metal ions the complexation reaction is both enthalpy and entropy driven. ΔH is 10.1 kJ/mol more negative than ΔH, whereas the entropy difference is small. The difference in ΔG between the formation of the CmIII and EuIII complexes is in good agreement with nPr-BTP's selectivity in liquid-liquid extraction.