Abstract
The photoacoustic (PA) amplitude spectra of Eu(Dbm) 3Phen, Eu 0.8Gd 0.2(Dbm) 3Phen and Eu 0.8Nd 0.2(Dbm) 3Phen complexes (Dbm: dibenzoylmethane; Phen: phenanthroline) have been measured, and the PA phase data of the different complexes calculated. The PA amplitude spectra combined with the luminescence spectra reflected the variation of the luminescence efficiency, and the PA phase is directly relative to the lifetime of Eu 3+5D 0 level. The luminescence efficiency and the lifetime of Eu 3+5D 0 level increase when Gd 3+ is introduced, while they decrease greatly when Nd 3+ is added, which is due to the different intermolecular energy transfer processes. The models of energy transfer and relaxation processes of Eu 0.8Gd 0.2(Dbm) 3Phen and Eu 0.8Nd 0.2(Dbm) 3Phen are established.
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