Photoacoustic Spectroscopy Study of the Co-luminescence Effect of Lanthanide-dibenzoylmethane, Phenanthroline Complex Powders and Their Doped Silica Gels

Abstract

Abstract: Eu(Dbm)₃·Phen and Eu_0.8 Ln_0.2 (Dbm)₃·Phen(Ln: Er³⁺, Y³⁺; Dbm: dibenzoylmethane; Phen: phenanthroline) complex powders and their doped silica gels have been prepared. Their photoacoustic(PA) spectra have been detected and interpreted for the first time. In the region of ligand absorption, the PA intensity decreases for Eu_0.8 Er_0.2(Dbm)₃·Phen, Eu(Dbm)₃·Phen and Eu_0.8 Y_0.2 (Dbm)₃ ·Phen respectively. While for Eu(Dbm)₃·Phen and Eu_0.8 Y_0.2 (Dbm)₃·Phen doped silica gels, the reverse is true. It is found that the PA intensity bears a correlation with the energy transfer processes of the complexes. The additions of Er³⁺, Y ³⁺ ion change the relaxation processes of the complexes and the relaxation processes of ternary complexes are different in the two kinds of solid states. The changes of fluorescence spectra turn out to be complementary to the PA spectra. The luminescence properties of the complex powders and their doped silica gels are interpreted in depth from two aspects: nonradiative process and radiative process.

Key words: Lanthanide complex, Photoacoustic spectroscopy, Silica gel, Co luminescence effect

CLC Number:

O657.3

TrendMD:

YANG Yue Tao, ZHANG Shu Yi . Photoacoustic Spectroscopy Study of the Co-luminescence Effect of Lanthanide-dibenzoylmethane, Phenanthroline Complex Powders and Their Doped Silica Gels[J]. Chem. J. Chinese Universities, 2003, 24(4): 662.

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Photoacoustic Spectroscopy Study of the Co-luminescence Effect of Lanthanide-dibenzoylmethane, Phenanthroline Complex Powders and Their Doped Silica Gels

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