Status: Bibliographieeintrag
Standort: ---
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| Online-Ressource |
Verfasst von: | Bremer, Antje [VerfasserIn]  |
| Müllich, Udo [VerfasserIn]  |
| Geist, Andreas [VerfasserIn]  |
| Panak, Petra [VerfasserIn]  |
Titel: | Influence of the solvent on the complexation of Cm(III) and Eu(III) with nPr-BTP studied by time-resolved laser fluorescence spectroscopy |
Verf.angabe: | Antje Bremer, Udo Müllich, Andreas Geist and Petra J. Panak |
Jahr: | 2015 |
Jahr des Originals: | 2014 |
Umfang: | 9 S. |
Fussnoten: | First published 11 December 2014 ; Gesehen am 28.05.2020 |
Titel Quelle: | Enthalten in: New journal of chemistry |
Ort Quelle: | London : RSC, 1987 |
Jahr Quelle: | 2015 |
Band/Heft Quelle: | 39(2015), 2, Seite 1330-1338 |
ISSN Quelle: | 1369-9261 |
Abstract: | The complexation of Cm(III) and Eu(III) with 2,6-bis(5,6-dipropyl-1,2,4-triazin-3-yl)pyridine (nPr-BTP) in methanol-water mixtures with varying water content is investigated by TRLFS. For both metal ions, the exclusive formation of the 1 : 3 complex is observed in each solvent mixture. Stability constants are determined by analysis of the fluorescence spectra. As a result, an immense influence of the water content is found. The stability constant of the [Cm(nPr-BTP)3]3+ complex increases by three orders of magnitude when the water content in methanol-water mixtures is reduced (log β3 = 14.3 ± 0.1 at 50 vol% water content; log β3 = 17.4 ± 0.4 at 5 vol% water content). Due to the preferential solvation of Cm(III) by water in methanol-water mixtures, the increase is moderate at water contents between 50 vol% and 20 vol% and becomes steeper at lower water contents. For the [Eu(nPr-BTP)3]3+ complex, an analogous evolution of the stability constant is observed (log β3 = 12.0 ± 0.1 at 50 vol% water content; log β3 = 14.7 ± 0.4 at 5 vol% water content). Therefore, the difference between the stability constants of the Cm(III) and Eu(III) 1 : 3 complexes is constant at all solvent mixtures investigated (Δlog β3 = 2.3 ± 0.3) which means that the selectivity of the N-donor ligand is not influenced by the solvent. |
DOI: | doi:10.1039/C4NJ01900H |
URL: | Bitte beachten Sie: Dies ist ein Bibliographieeintrag. Ein Volltextzugriff für Mitglieder der Universität besteht hier nur, falls für die entsprechende Zeitschrift/den entsprechenden Sammelband ein Abonnement besteht oder es sich um einen OpenAccess-Titel handelt.
Volltext ; Verlag: https://doi.org/10.1039/C4NJ01900H |
| Volltext: https://pubs.rsc.org/en/content/articlelanding/2015/nj/c4nj01900h |
| DOI: https://doi.org/10.1039/C4NJ01900H |
Datenträger: | Online-Ressource |
Sprache: | eng |
K10plus-PPN: | 1698965427 |
Verknüpfungen: | → Zeitschrift |
Influence of the solvent on the complexation of Cm(III) and Eu(III) with nPr-BTP studied by time-resolved laser fluorescence spectroscopy / Bremer, Antje [VerfasserIn]; 2015 (Online-Ressource)
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