用时间分辨荧光光谱研究微环境对Eu(TTA)_3和Eu(DB)_3发光的影响

The Study of Eu(TTA)_3 and Eu(DB)_3 Luminescence in Microenvironments by Time-resolved Fluorescence Spectrum

应用时间分辨荧光光谱方法研究了微环境对Eu^(3+)络合物发光的影响,测定了NCS^-对Eu(TTA)_3和Eu(DB)_3的荧光猝灭。实验表明,Eu^(3+)的~5D_0能级弛豫速率K_0随NCS^-的引入而增大,NCS^-离子导致的微环境变化,影响了Eu^(3+)的Laporte选择规则,改变了Eu^(3+)与配位体间相互作用的程度。

The luminescence of Eu^(3+) complexes influenced by microenvironments and the fluorescence quenching of Eu(TTA)_3 and Eu(DB)_3 with NCS^- added have been studied with timeresolved fluorescence spectrometry. The experiments show that the relaxation rate k_0 of the ~5D_0 level in Eu^(3+) increases with the introduce of NCS^- anions. In the result, the microenvironment change caused by the introduce of NCS^- anions influences on Laporte selective law of Eu^(3+) ions and intereaction between Eu^(3+) and the ligands.