Complexation of Cm(III) and Eu(III) with CyMe4-BTPhen and CyMe4-BTBP studied by time resolved laser fluorescence spectroscopy

• Verfasst von: Bremer, Antje [VerfasserIn]
• Verfasst von: Whittaker, Daniel M. [VerfasserIn]
• Verfasst von: Sharrad, Clint A. [VerfasserIn]
• Verfasst von: Geist, Andreas [VerfasserIn]
• Verfasst von: Panak, Petra [VerfasserIn]
• Titel: Complexation of Cm(III) and Eu(III) with CyMe4-BTPhen and CyMe4-BTBP studied by time resolved laser fluorescence spectroscopy
• Verf.angabe: Antje Bremer, Daniel M. Whittaker, Clint A. Sharrad, Andreas Geist and Petra J. Panak
• Jahr: 2014
• Jahr des Originals: 2013
• Umfang: 11 S.
• Fussnoten: First published 11 Dec 2013 ; Gesehen am 13.10.2020
• Titel Quelle: Enthalten in: Dalton transactions
• Ort Quelle: London : Soc., 1972
• Jahr Quelle: 2014
• Band/Heft Quelle: 43(2014), 6, Seite 2684-2694
• ISSN Quelle: 1477-9234
• DOI: doi:10.1039/C3DT52204K
• Datenträger: Online-Ressource
• Sprache: eng
• K10plus-PPN: 1735431125

Abstract

The complexation of Cm(III) and Eu(III) with 2,9-bis(5,5,8,8-tetramethyl-5,6,7,8-tetrahydro-1,2,4-benzotriazin-3-yl)-1,10-phenanthroline (CyMe4-BTPhen) and 6,6′-bis(5,5,8,8-tetramethyl-5,6,7,8-tetrahydro-1,2,4-benzotriazin-3-yl)-2,2′-bipyridine (CyMe4-BTBP) in methanolic solution was investigated by TRLFS. For both ligands, the 1:2 complex with the particular metal ion is the only species observed in equilibrated samples. The species distribution for various ligand concentrations was determined and stability constants of the 1:2 complexes were derived (log β2 = 13.8 ± 0.2 (Cm(III)-CyMe4-BTPhen), log β2 = 11.6 ± 0.4 (Eu(III)-CyMe4-BTPhen), log β2 = 12.4 ± 0.3 (Cm(III)-CyMe4-BTBP) and log β2 = 11.3 ± 0.3 (Eu(III)-CyMe4-BTBP)). Biphasic experiments in combination with TRLFS studies on the organic phase revealed the formation of ternary complexes with two CyMe4-BTPhen or -BTBP molecules and additional coordination of a nitrate anion as species formed during the extraction process.