INTERLIGAND ENERGY TRANSFER IN EUROPIUM(III) MESOGENIC ADDUCTS
D. V. Lapaev, V. G. Nikiforov, G. M. Safiullin, I. G. Galyaviev, V. I. Dzabarov, А. А. Knyazev, V. S. Lobkov, Y. G. Galyametdinov
Keywords: rare-earth complexes, ?-diketones, europium(III), intramolecular energy transfer, spectroscopic properties
Pages: 802-808
Abstract
An analysis of the absorption and luminescence spectra and luminescence kinetics showed that in the Eu(DK)3bpy17-17 mesogenic adduct, 5,5′-diheptadecyl-2,2′-bipyridine (bpy17-17) took an active part in the energy transfer to the Eu3+ ion. The interligand energy transfer from β-diketonate (DK) ligands was the major mechanism of excitation of bpy17-17. Importantly, the interligand excitation complex considerably decreased radiation losses during the energy transfer from the absorbing DK ligands to the emitting level of Eu3+.
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