A complexation study of 2,6-bis(1-(p-tolyl)-1H-1,2,3-triazol-4-yl)pyridine using single-crystal X-ray diffraction and TRLFS

• Verfasst von: Kiefer, Claude [VerfasserIn]
• Verfasst von: Wagner, Anna. T. [VerfasserIn]
• Verfasst von: Beele, Björn B. [VerfasserIn]
• Verfasst von: Geist, Andreas [VerfasserIn]
• Verfasst von: Panak, Petra [VerfasserIn]
• Verfasst von: Roesky, Peter W. [VerfasserIn]
• Titel: A complexation study of 2,6-bis(1-(p-tolyl)-1H-1,2,3-triazol-4-yl)pyridine using single-crystal X-ray diffraction and TRLFS
• Verf.angabe: Claude Kiefer, Anna. T. Wagner, Björn B. Beele, Andreas Geist, Petra J. Panak, and Peter W. Roesky
• E-Jahr: 2015
• Jahr: July 13, 2015
• Umfang: 8 S.
• Fussnoten: Gesehen am 29.06.2020
• Titel Quelle: Enthalten in: Inorganic chemistry
• Ort Quelle: Washington, DC : American Chemical Society, 1962
• Jahr Quelle: 2015
• Band/Heft Quelle: 54(2015), 15, Seite 7301-7308
• ISSN Quelle: 1520-510X
• DOI: doi:10.1021/acs.inorgchem.5b00803
• Datenträger: Online-Ressource
• Sprache: eng
• K10plus-PPN: 1702893251

Abstract

To develop a selective ligand for the separation of lanthanides(III) and actinides(III) the coordination chemistry of the chelating N-donor ligand 2,6-bis(1-(p-tolyl)-1H-1,2,3-triazol-4-yl)pyridine (BTTP) was investigated. The two isostructural lanthanide compounds [Ln(BTTP)3(OTf)3] (Ln = Eu (1), Sm (2); OTf = trifluoromethanesulfonate) were synthesized and fully characterized. The solid-state structures of both compounds were established by single-crystal X-ray diffraction. The complexation of Cm(III) and Eu(III) with BTTP in acetonitrile was studied using time-resolved laser fluorescence spectroscopy. With increasing BTTP concentration Cm(III) 1:2 and 1:3 complexes and Eu(III) 1:1 and 1:3 complexes are identified. The conditional stability constants of the 1:3 complex species with BTTP are log β3 = 14.0 for Cm(III) and log β3 = 10.3 for Eu(III). Both M(III) 1:3 complexes are prone to decomplexation with increasing acidity.