一种新型铕的有机配合物的光物理特性及机理研究

doi:10.3964/j.issn.1000-0593(2010)10-2606-05

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摘要：基于吸收及荧光光谱技术对一种新型铕的有机配合物发光材料在不同状态下的光谱特性进行了表征，并分析了该配合物的光物理特性与机理。发现该配合物的吸收光谱主要是配体邻菲咯啉(phen)的贡献;随着浓度增大自短波到长波区域逐渐出现了饱和吸收现象，光谱向长波方向延伸、展宽，而且这种特征在样品的激发光谱上得到了体现;该配合物在不同状态下的荧光光谱均由Eu³⁺的4个特征荧光峰组成，且出现617 nm强荧光峰。提出该配合物的荧光光谱主要是在配体乙酰苯胺的微扰或介导作用下，改变了Eu³⁺能量场的宇称态，导致跃迁概率大大增强，并使配体phen将吸收的能量转移给Eu³⁺，发出617 nm强荧光峰。表明这种新型铕的有机配合物是一种有效的红光有机发光材料，具有潜在的应用价值。

关键词：铕有机配合物;有机发光材料;发光机理;乙酰苯胺

Abstract：Based on fluorescence and absorbance spectroscopy, the photophysical properties and mechanisms of novel organic europium (Ⅲ) complexes in the case of different concentration in ethanol solution and solid flour were studied at room temperature. It was found that the complex absorption spectra are mainly due to the Phenanthroline ligand, gradually exhibit saturated absorption from shortwave to long wave with the concentration increased, and stretch and broaden to long wave. And four characteristic peaks of the fluorescence spectra are all emission spectra of Eu³⁺ in the complex, and the strongest emission wavelength was 617 nm corresponding to the ⁵D₀→⁷F₂ transition of Eu³⁺. And then, it is presented that the perturbation of acetanil ligand changes the parity state of Eu³⁺ energy field, resulting in the increase of ⁵D₀→⁷F₂ transition probability, making phenanthroline transfer its energy absorbed to Eu³⁺, and inducing 617nm strong emission of fluorescence peak.

Key words：Eu complex;Organic light-emitting materials;Photophysical;Acetanilin the complex

收稿日期: 2009-11-06 修订日期: 2010-02-08

中图分类号:

O614.3

通讯作者: 高淑梅 E-mail: gaosm@jiangnan.edu.cn

引用本文:

闫冠峰¹，王权²，魏柏林¹，孙晓晨¹，陈国庆¹，高淑梅^1* . 一种新型铕的有机配合物的光物理特性及机理研究 [J]. 光谱学与光谱分析, 2010, 30(10): 2606-2610.
YAN Guan-feng¹, WANG Quan², WEI Bo-lin¹, SUN Xiao-chen¹, CHEN Guo-qing¹, GAO Shu-mei^1* . Photophysical Properties of Novel Organic Europium (Ⅲ) Complexes. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2010, 30(10): 2606-2610.

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