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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

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...

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Main Authors: Kiefer, Claude (Author) , Wagner, Anna. T. (Author) , Beele, Björn B. (Author) , Geist, Andreas (Author) , Panak, Petra (Author) , Roesky, Peter W. (Author)
Format: Article (Journal)
Language:English
Published: July 13, 2015
In: Inorganic chemistry
Year: 2015, Volume: 54, Issue: 15, Pages: 7301-7308
ISSN:1520-510X
DOI:10.1021/acs.inorgchem.5b00803
Online Access:Resolving-System, lizenzpflichtig, Volltext: https://doi.org/10.1021/acs.inorgchem.5b00803
Verlag, lizenzpflichtig, Volltext: https://pubs.acs.org/doi/10.1021/acs.inorgchem.5b00803
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Author Notes:Claude Kiefer, Anna. T. Wagner, Björn B. Beele, Andreas Geist, Petra J. Panak, and Peter W. Roesky
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Summary: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.
Item Description:Gesehen am 29.06.2020
Physical Description:Online Resource
ISSN:1520-510X
DOI:10.1021/acs.inorgchem.5b00803

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