【摘要】 应用荧光光谱、吸收光谱及荧光寿命测量研究了TritonX-100中,Eu(Ⅲ)-Y-TTA-phen的发光增强现象及可能的增强机理,认为这种发光增强是由于钇络合物的“包围”作用和从钇络合物到铕络合物分子之间经三重态-三重的能量传递。更多还原

【Abstract】 The fluorescence enhancement phenomenon of Y-Eu（Ⅲ）-TTA-phen in Triton X-100 micellar solution has been studied. Fluorescence absorption, emission and decay time of Eu³⁺ complexed with β-diketone system in micellar solution containing TritonX-100 were observed. We found that in the complex system the fluorescence of intensification of Y on Eu³⁺ inoreased rapidly. The cause of the fluorescence enhancement effect, we consider, is as follows. First, radiationless relaxation deactivation process of the Eu³⁺ electronic levels by interaction with H₂O vibrational levels were reduced at the presence of Y ion in the solution. Second, probably the energy transfer from Y-complex to Eu-complex had taken place. In addition, the RE with inert structure also increased in Eu³⁺ luminescence in the same system. The sequence of the increase is: Gd³⁺>Y³⁺>Lu³⁺. Another RE (Sm³⁺,Nd³⁺) having luminescence properties, however, decreased in the Eu³⁺ luminescence intensities. The red shifts of the absorption peaks of Eu³⁺ complex by Y, Gd and Lu were measured. The red shifts indicat that the lowest singlet stats （S₁） had decreads. Therefore, transition probability from S₁ to T₁ had incresed. Thus, the energy transfer from T₁ to ⁵D_0,1 levels of the centeral Eu³⁺ had been further enhanced.更多还原