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Proceedings Paper

Blocking of the luminescence excitation of lanthanide compounds
Author(s): V. I. Tsaryuk
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Paper Abstract

The luminescence excitation spectra of europium β-diketonates, aromatic carboxylates, europium nitrates with sulfoxides are analysed. Some processes of transfer and degradation of the excitation energy, which can change the luminance of europium materials, are discussed. Variation of the relative contribution of two inequivalent ligands to the luminescence excitation of europium β-diketonates with heterocyclic diimines upon modification of ligand radicals was investigated. The participation of the ligand-metal charge transfer states both in degradation of the excitation energy and in enhancement of Eu3+ luminescence excitation was analysed. Decrease of the ligand-metal charge transfer at introduction of the nitro-groups in the ligand aromatic ring, which sensitizes the Eu3+ luminescence, was revealed. The blocking influence of methylene and oxymethylene bridges on the efficiency of the europium luminescence excitation was considered. It was demonstrated, that the donor-acceptor ability of radicals -(CH2)nCH3 and steric factor effect the Eu3+ electronic transitions and vibronic interaction.

Paper Details

Date Published: 20 July 2004
PDF: 11 pages
Proc. SPIE 5507, XVI International Conference on Spectroscopy of Molecules and Crystals, (20 July 2004); doi: 10.1117/12.569620
Show Author Affiliations
V. I. Tsaryuk, Institute of Radioengineering and Electronics (Russia)

Published in SPIE Proceedings Vol. 5507:
XVI International Conference on Spectroscopy of Molecules and Crystals
Galyna O. Puchkovska; Tatiana A. Gavrilko; Olexandr I. Lizengevich, Editor(s)

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