Details

Autor(en) / Beteiligte

• Kiefer, Claude
• Wagner, Anna. T
• Beele, Björn B
• Geist, Andreas
• Panak, Petra J
• Roesky, Peter W

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

Ist Teil von

• Inorganic chemistry, 2015-08, Vol.54 (15), p.7301-7308

Ort / Verlag

United States: American Chemical Society

Erscheinungsjahr

2015

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• 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.