均苯三甲酸铽掺杂(钇、钆)配合物的合成及荧光性质

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Abstract In the present paper two series of mixed rare earth complexes Tb_(1-x)LnxBTC·nH₂O(Ln=Y，Gd, x=0，0.1，0.3，0.5，0.7，0.9) were synthesized by hydrothermal method. The contents of rare earth were measured by using EDTA titration method; the element analyses of C and H were performed by using Vario EL Ⅲ elemental analyzer, and the IR spectra were recorded by FTIR-8900 infrared spectroscopy with KBr pellet. Then the molecular formula of the complexes were determined to be Tb_(1-x)Ln_xBTC·0.5H₂O(Ln=Y，Gd). The fluorescence spectrum of all the complexes were recorded by using a Hitachi F-4500 fluorescence spectrophotometer at room temperature. The results indicated that all the complexes emitted characteristic fluorescence of Tb³⁺, and the fluorescence intensities of the complexes were obviously enhanced with doping rare earth ion of Y³⁺ or Gd³⁺. It was showed that Tb³⁺ was sensitized by doping rare earth ions. This may be because there was intra molecular energy transfer in the complexes. Being doped with the rare earth ion the emission peak positions did not change. Among the four emission peaks, ⁵D₄→⁷F₅(544nm) was the strongest one, and it was found when the proportion is Y³⁺∶Tb³⁺=0.5∶0.5 or Gd³⁺∶Tb³⁺=0.3∶0.7, the fluorescence intensity of Tb_(1-x)Y_xBTC·0.5H₂O or Tb_(1-x)Gd_xBTC·0.5H₂O was the greatest, meanwhile the sensitization degree was bigger with doping Gd³⁺ than doping Y³⁺ at 544nm.

Key words：Trimesic acid;Rare earth;Doping;Coordination complex;Fluorescence

Received: 2006-07-16 Accepted: 2006-10-26

ZTFLH:

O614.3

Corresponding Authors: SONG Hui-hua E-mail: Songhuihua@mail.hebtu.edu.cn

Cite this article:

SONG Hui-hua,YANG Fang,WANG Ji-ye, et al. Synthesis and Fluorescence Properties of the Tb(Ln) Complexes with Trimesic Acid (Ln=Y, Gd)[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2007, 27(10): 2093-2097.

URL:

https://www.gpxygpfx.com/EN/Y2007/V27/I10/2093

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