[Study on intramolecular energy transfer and relaxation processes of rare earth complexes by photoacoustic and fluorescence spectroscopy].
The excitation-relaxation processes of the solid Tb(III) complexes (Tb(AA)3.2H2O, Tb(AA)3 bpy and Tb(AA)3 phen) have been studied by photoacoustic spectroscopy (PAS) with the conjunction of fluorescence spectroscopy. The relaxation processes are studied from two aspects: nonradiative process and radiative process. The photoacoustic amplitude spectra and luminescence spectra of the complexes have been measured. Combined with the luminescence spectra, the PA amplitude spectra reflect the variation of the luminescence efficiency. According to the variation of the luminescence efficiency, the intramolecular energy transfer and relaxation processes of the complexes were studied. The suitability of the energy gap between the lowest triplet level of ligand and resonance energy level of rare earth ion is critical for efficient energy transfer.
Wu
R
R
Dept. of Chem., Univ. of Sci. and Tech. of China, 230026 Hefei.
Song
H
H
Su
Q
Q
D000162:Acoustics; D004735:Energy Transfer; D049449:Luminescence; D008674:Metals, Rare Earth / Q000737:chemistry*; D009942:Organometallic Compounds / Q000737:chemistry*; D010777:Photochemistry; D013050:Spectrometry, Fluorescence; D013725:Terbium / Q000737:chemistry*
D008674:Metals, Rare Earth; D009942:Organometallic Compounds; D013725:Terbium