Abstract
Spectral and kinetic characteristics of luminescence of the Eu3+ complex EuTTA3Phen (where TTA is thenoyltrifluoroacetone and Phen is 1,10-phenanthroline) and the triplet state 3TTA of the nonluminescent complex GdTTA3 Phen, as well as mixtures of these complexes, have been studied in a CH2Cl2 solution, in finely porous glass (PG) filled with the solution, in a CH2Cl2 monolayer on the PG surface, and in the adsorbed state on the dry PG surface. The yields of Eu3+ luminescence and 3TTA for mixtures of the complexes in a solution, including the solution located in PG, correspond to those expected from the portion of the absorbed light. However, in the monolayer and on a dry PG surface, the luminescence yield observed is substantially higher and the 3TTA yield is lower than those expected, which is due to static energy transfer from the triplet states of TTA in the complex with Gd3+ to TTA in the complex with Eu3+ in mixed clusters of the complexes on the surface.
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Original Russian Text © P.P. Levin, N.L. Zaichenko, L.S. Kol’tsova, I.R. Mardaleishvili, N.B. Sul’timova, A.I. Shienok, 2013, published in Khimiya Vysokikh Energii, 2013, Vol. 47, No. 4, pp. 287–292.
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Levin, P.P., Zaichenko, N.L., Kol’tsova, L.S. et al. Study of kinetics of luminescence and triplet-triplet absorption of a mixture of europium and gadolinium chelate complexes in finely porous glass. High Energy Chem 47, 166–170 (2013). https://doi.org/10.1134/S0018143913040097
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DOI: https://doi.org/10.1134/S0018143913040097