1. The relaxation study of dibenzoylmethane in different molecules by photoacoustic amplitude and phase spectra
- Author
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Song, Huiyu, Yu, Xijuan, Zhao, Huazhang, and Su, Qingde
- Subjects
- *
PHOTOACOUSTIC spectroscopy , *DIBENZOYLMETHANE - Abstract
The amplitude and the phase of the photoacoustic (PA) signal generated in Nd(DBM)3 and Nd(DBM)3·Phen (DBM: dibenzoylmethane; Phen: 1,10-phenanthroline) complex powders were examined. By using PA amplitude and phase spectra, together with IR and fluorescence spectra, the intramolecular relaxation processes and the fluorescence properties of DBM were studied. And a new method to calculate the relaxation time of the ligand of rare earth complexes was presented. Compared with the free ligand DBM, the relaxation time of DBM in Nd(DBM)3 and Nd(DBM)3·Phen complexes calculated by the new method had the order: free ligand>in Nd(DBM)3>in Nd(DBM)3·Phen. The fluorescence spectra verified the validity of the new method. The intramolecular energy transfer models were established on the basis of the calculated results and the fluorescence spectra. [Copyright &y& Elsevier]
- Published
- 2002
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