EXPERIMENTAL AND THEORETICAL EMISSION QUANTUM YIELD IN THE COMPOUND EU(THENOYLTRIFLUOROACETONATE)(3).2(DIBENZYL SULFOXIDE)

We report the experimental determination and a theoretical calculation of the 4f-4f emission quantum yield in the Eu(thenoyltrifluoroacetona te)(3).2(dibenzyl sulfoxide) compound. The experimental procedure for determining the quantum yields is based on a method previously propose d by Bril and coworkers. The theoretical calculations are carried out by solving an appropriate set of rate equations and by using spectrosc opic parameters and energy transfer rates recently reported for this c ompound. For the sake of comparison, the hydrated compound (two water molecules in the place of the dibenzyl sulfoxide) is also studied. Goo d agreement between theory and experiment is obtained, provided that t he lifetime of the lowest triplet level of the donor ligand is greater than or equal to 10(-5) s at room temperature. (C) 1998 Elsevier Scie nce B.V.