| 光谱学与光谱分析 |
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| Spectral Study of the Compound Zn(Pht)∶ 0.05 Sm |
| SUN Rui-qing，ZHANG Han-hui，YANG Qi-yu |
| Department of Chemistry, Fuzhou University, Fuzhou 350002，China |
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Abstract Zn(Pht) ∶0.05 Sm compounds have been synthesized by microwave. The compound was characterized by XRD，FTIR，NIR FT-Raman，DRS UV/Vis，fluorescence spectra，and TG analysis. FTIR and FT-Raman indicated that each of the carbonyl group in the phthalate of the compound combined with metal zinc as mono-dentate terminal chelating. Compared with Pht, the title compound’s π→π* from phthalate shifted from 255 and 289 nm to 235 and 270 nm，respectively. In the fluorescence spectra, there are emission peaks at 560, 596, 642 and 670 nm when excited by 240 nm，which correspond to the transitions from Sm3+’s emission states of 4G5/2，6H7/2，6H9/2 and 6H11/2 to the ground state. As a result, Zn(Pht) improves the emission efficiency of Sm3+ notably. At the emission peak of 596 and 642 nm when excited by 240 nm, the fluorescence lifetime of the compound is τ1=1.57 ns and τ2=76.94 ns, and τ1=1.19 ns and τ2=55.64 ns，respectively. TGA showed that the title compound begins to decompose at 380℃, while it is stable below 380℃.
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Received: 2002-11-26
Accepted: 2003-04-06
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Corresponding Authors:
SUN Rui-qing
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