Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1233786 | Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy | 2011 | 4 Pages |
Abstract
For the first time Am(III) complexation with a small organic ligand could be identified and characterized with time-resolved laser-induced fluorescence spectroscopy (TRLFS) at room temperature and trace metal concentration. With pyromellitic acid (1,2,4,5-benzene-tetracarboxylic acid, BTC) as ligand spectroscopic characteristics for the Am–BTC complex system were determined at pH 5.0, an ionic strength of 0.1 M (NaClO4) and room temperature. The fluorescence lifetimes were determined to be 23.2 ± 2.2 ns for Am3+(aq) and 27.2 ± 1.2 ns for the Am–BTC 1:1 complex; the emission maximum for the 5D1–7F1 transition is 691 nm for both species. The complex stability constant for the Am–BTC 1:1 complex was calculated to be log β110 = 5.42 ± 0.16.
Related Topics
Physical Sciences and Engineering
Chemistry
Analytical Chemistry
Authors
Astrid Barkleit, Gerhard Geipel, Margret Acker, Steffen Taut, Gert Bernhard,