化学学报 ›› 2000, Vol. 58 ›› Issue (8): 1027-1030. 上一篇    下一篇

研究论文

铕(Ⅲ)-二苯甲酰甲烷-铵阳离子配合物发光性质及 传能过程的溶剂效应研究

孙照勇;余智;艾希成;冯娟;张光康;张启元   

  1. 中国科学院化学研究所分子科学中心;中国科学院分子动态与稳态结构国家重点 实验室;南京大学化学化工学院
  • 出版日期:2000-08-15 发布日期:2000-08-15

Study of solvent effects of luminescent properties and energy transfer processes of Eu(Ⅲ)-dibenzoylmethane-ammonium cation complexes

Sun Zhaoyong;Yu Zhi;Ai Xicheng;Feng Juan;Zhang Guangkang;Zhang Qiyuan   

  • Online:2000-08-15 Published:2000-08-15

利用瞬态与稳态光谱研究了铕(Ⅲ)-二苯甲酰甲烷-铵阳离子系列新型配合物在乙醇、DMF和环己烷三种极性不同溶剂中的光谱性质,发现不同铵阳离子配合物在同种极性溶剂中的瞬态与稳态光谱性质几乎完全一致,而在非极性溶剂中略有差异。配合物在乙醇和DMF溶剂中荧光呈单指数衰减,在环己烷溶剂中呈双指数衰减。通过计算表明,在乙醇和DMF中,配合物中铕离子^5D~0激发态的能量布局不同。

关键词: 铕络合物, 二苯甲酰甲烷, 溶剂效应, 铵, 乙醇, 环己烷, 二甲基甲酰胺

Optical properties of Eu(Ⅲ)-dibenzoylmethane-ammonium cation complexes in ethanol, DMF, cyclohexane, which have different polarity, were investigated using UV-vis, fluorescence and transient spectroscopic methods. It is found that the spectroscopic properties of different ammonium cation complexes are almost consistent in the same kind of polar solvent, but slightly different in nonpolar solvent. The luminescent decay curves of the complexes are single exponential in ethanol and DMF, but double exponential in cyclohexane. The calculation results show that the populations of Eu^3^+ ^5D~0 excited states are different in ethanol and DMF.

Key words: EUROPIUM COMPLEX, DIBENZOYL METHANE, SOLVENT EFFECT, AMMONIUM, ETHANOL, CYCLOHEXANE, DIMETHYLFORMAMIDE

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