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利用稳态和瞬态光谱方法研究了不同铕离子发光体系中各种因素对铕离子发光性质的影响 .通过吸收和激发光谱的变化分析了稀土离子 Gd3 +对 Eu3 +增敏机理 ,并从荧光衰减动力学角度证明了主配体噻吩甲酰三氟丙酮 ( TTA)、协配体邻啡咯啉 ( Phen)、稀土离子 Gd3 +和表面活性剂 TX-1 0 0对铕离子发光的增敏作用 .4种发光体系 Eu3 +/Gd3 +/TTA/Phen/TX-1 0 0 ,Eu3 +/TTA/Phen/TX-1 0 0 ,Eu3 +/Gd3 +/TTA/Phen和Eu3 +/Gd3 +/TTA/TX-1 0 0中铕离子 5D0 态的发光寿命依次为 980 >6 70 >4 0 0 >2 6 0 μs,而且存在铕离子 5D1到 5D0 的传能过程 .在发光越强的体系中 ,5D1 的衰减越慢 ,相应地 5D0 的上升时间也就越长 .研究结果表明 ,在最佳发光体系中既存在分子内的能量转移 ,又存在分子间的能量传递
The effects of various factors on the luminescent properties of Eu3 + ions were studied by steady-state and transient spectroscopic methods.The sensitization mechanism of rare earth ions Gd3 + to Eu3 + was analyzed by the changes of absorption and excitation spectra, Attenuation kinetics demonstrated that the main ligands, thiophenacyltrifluoroacetone (TTA), the synergistic ligands Phen, Gd3 +, and TX-1O0, enhance the luminescence of europium ions Eu3 + / Gd3 + / TTA / Phen / TX-1 0 0, Eu3 + / TTA / Phen / TX- 1 0 0, Eu3 + / Gd3 + / TTA / Phen and Eu3 + / Gd3 + / TTA / TX-1 0 0, the luminescence lifetime of europium ion 5D0 state is 980> 6 70> 4 0 0> 2 6 0 μs, and there is the process of energy transfer from europium ions 5D1 to 5D0. , The slower the attenuation of 5D1, the longer the rising time of 5D0 correspondingly.The results show that there exists both intramolecular energy transfer and intermolecular energy transfer in the best luminescence system