Spectroscopic investigations of complexes between Eu(III) and aromatic carboxylic ligands
- In order to obtain information on the number and symmetry of the different Eu3+ complexes formed with several hydroxybenzoic acids, ultra-low temperature luminescence measurements at 4.7 K were carried out. Hydroxybenzoic acids were used as simple model compounds for metal binding structures in humic substances (HS). Information on the complexes was extracted from high-resolution total luminescence spectra (TLS), which were obtained by scanning through the D-5(0) <-- F-7(0) transition of Eu(III) with a pulsed dye laser and measuring the emission in the wavelength range of the D- 5(0) --> F-7(0) and D-5(0) --> F-7(0) transitions simultaneously. By extracting the crystal field strength parameter N- v(B-2q) from the TLS, it was found that N-v(B-2q) was not directly correlated with the excitation energy. Further, the symmetry of the individual complexes formed was extracted from the experimental data. (C) 2007 Elsevier B.V. All rights reserved.
Author details: | Bettina Marmodée, Joost Klerk de, Michael Uwe KumkeORCiDGND, Freek Ariese, Cees Gooijer |
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DOI: | https://doi.org/10.1016/j.jallcom.2007.04.150 |
Publication type: | Article |
Language: | English |
Year of first publication: | 2008 |
Publication year: | 2008 |
Release date: | 2017/03/24 |
Source: | Journal of alloys and compounds. - 451 (2008), 1-2, S. 361 - 364 |
Organizational units: | Mathematisch-Naturwissenschaftliche Fakultät / Institut für Chemie |