Effects of Ag colloidal nanoparticles on luminescent properties of Eu(III) beta-diketone

摘要

Luminescent properties of Eu(TTA)_3 centre dot 2H_2O complex (TTA: trifluorothenoyl-acetone) and Eu(DBM)_3 centre dot 2H_2O complex (DBM: dibenzoyl-methane) in MMA (methyl methacrylate) solution had been studied in the presence of Ag colloidal nanoparticles. Luminescence of Eu (TTA)_3 centre dot 2H_2O complex was enhanced comparing to the Eu complex with the same concentration because it could aggregate around surface of Ag nanoparticles. Contrarily, luminescence of Eu(DBM)_3 centre dot 2H_2O complex was quenched with increasing in Ag colloidal concentration. The results are attributed to different structures between TTA and DBM.