TRLFS study on the complexation of Cm(III) and Eu(III) with SO3-Ph-BTBP

• Verfasst von: Wagner, Christoph [VerfasserIn]
• Verfasst von: Müllich, Udo [VerfasserIn]
• Verfasst von: Geist, Andreas [VerfasserIn]
• Verfasst von: Panak, Petra [VerfasserIn]
• Titel: TRLFS study on the complexation of Cm(III) and Eu(III) with SO3-Ph-BTBP
• Verf.angabe: Christoph Wagner, Udo Müllich, Andreas Geist and Petra J. Panak
• E-Jahr: 2015
• Jahr: 7 September 2015
• Umfang: 9 S.
• Fussnoten: Gesehen am 26.06.2020
• Titel Quelle: Enthalten in: Dalton transactions
• Ort Quelle: London : Soc., 1972
• Jahr Quelle: 2015
• Band/Heft Quelle: 44(2015), 39, Seite 17143-17151
• ISSN Quelle: 1477-9234
• DOI: doi:10.1039/C5DT02923F
• Datenträger: Online-Ressource
• Sprache: eng
• K10plus-PPN: 1702645177

Abstract

The complexation of Cm(III) and Eu(III) with a water soluble BTBP (sodium 3,3′,3′′,3′′′-([2,2′-bipyridine]-6,6′-diylbis(1,2,4-triazine-3,5,6-triyl))tetrabenzenesulfonate, SO3-Ph-BTBP) is studied using time resolved laser fluorescence spectroscopy. For the complexation of Cm(III) the influence of the medium (10−3 M HClO4 → 0.5 M HNO3) is investigated in detail revealing important impacts of the applied medium (pH, ionic strength, anions) on the speciation and conditional stability constants. SO3-Ph-BTBP forms 1 : 2 complexes with Cm(III) and Eu(III). The conditional stability constants of [Cm(SO3-Ph-BTBP)2]5− and [Eu(SO3-Ph-BTBP)2]5− in 0.5 M HNO3 are determined to be log β02 = 7.3 ± 0.3 and log β02 = 5.4 ± 0.5, respectively. The difference of 1.9 orders of magnitude is in line with hydrophobic BT(B)P type ligands and shows that the selectivity is not affected by tuning the hydrophilicity using SO3-Ph-side chains.