Blocking of the luminescence excitation of lanthanide compounds

V. I. Tsaryuk

doi:10.1117/12.569620

20 July 2004 Blocking of the luminescence excitation of lanthanide compounds

V. I. Tsaryuk

Proceedings Volume 5507, XVI International Conference on Spectroscopy of Molecules and Crystals; (2004) https://doi.org/10.1117/12.569620
Event: XVI International Conference on Spectroscopy of Molecules and Crystals, 2003, Sevastopol, Ukraine

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.

Citation Download Citation

V. I. Tsaryuk "Blocking of the luminescence excitation of lanthanide compounds", Proc. SPIE 5507, XVI International Conference on Spectroscopy of Molecules and Crystals, (20 July 2004); https://doi.org/10.1117/12.569620

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