Time-resolved laser fluorescence spectroscopy study of the coordination chemistry of a hydrophilic CHON (1,2,3-Triazol-4-yl)pyridine Ligand with Cm(III) and Eu(III)
The complexation of Cm(III) and Eu(III) with the novel i-SANEX complexing agent 2,6-bis[1-(propan-1-ol)-1,2,3-triazol-4-yl]pyridine (PTD) was studied by time-resolved laser fluorescence spectroscopy (TRLFS). The formation of 1:3, 1:2, and 1:1 metal/ligand complexes was identified upon increasing PTD...
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| Main Authors: | , |
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| Format: | Article (Journal) |
| Language: | English |
| Published: |
February 2, 2017
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| In: |
Inorganic chemistry
Year: 2017, Volume: 56, Issue: 4, Pages: 2135-2144 |
| ISSN: | 1520-510X |
| DOI: | 10.1021/acs.inorgchem.6b02788 |
| Online Access: | Verlag, Volltext: http://dx.doi.org/10.1021/acs.inorgchem.6b02788 Verlag, Volltext: https://doi.org/10.1021/acs.inorgchem.6b02788 
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| Author Notes: | Christoph Wagner, Eros Mossini, Elena Macerata, Mario Mariani, Arturo Arduini, Alessandro Casnati, Andreas Geist, and Petra J. Panak |
| Summary: | The complexation of Cm(III) and Eu(III) with the novel i-SANEX complexing agent 2,6-bis[1-(propan-1-ol)-1,2,3-triazol-4-yl]pyridine (PTD) was studied by time-resolved laser fluorescence spectroscopy (TRLFS). The formation of 1:3, 1:2, and 1:1 metal/ligand complexes was identified upon increasing PTD concentration in 10-3 mol/L HClO4 and in 0.44 mol/L HNO3 solutions. For all these complexes, stability constants were determined at different acid concentrations. Though under the extraction conditions proposed for an An/Ln separation process, that is, for 0.08 mol/L PTD in 0.44 mol/L HNO3, 1:3 complexes represent the major species, a significant fraction of 1:2 complexes was found. This is caused by ligand protonation, and results in lower Eu(III)/Am(III) separation factors compared to SO3-Ph-BTP, until now considered the i-SANEX reference ligand. Focused extraction studies performed at lower proton concentration, where the 1:3 complex is formed exclusively, confirm this assumption. |
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| Item Description: | Gesehen am 05.07.2018 (1,2,3-Triazol-4-yl): in Vorlage eckig geklammert |
| Physical Description: | Online Resource |
| ISSN: | 1520-510X |
| DOI: | 10.1021/acs.inorgchem.6b02788 |