Emission quantum yield of europium (III) mixed complexes with thenoyltrifluoroacetonate and some aromatic ligands
Emission quantum yield of europium (III) mixed complexes with thenoyltrifluoroacetonate and some aromatic ligands
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DOI：
10.1016/s0925-8388(00)00642-3
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发表时间：
2000-05-24
影响因子：
6.2
通讯作者：
Malta, OL
中科院分区：
文献类型：
--
作者：
Silva, FRGE;Menezes, JFS;Malta, OL
报道了Eu(Tta)(3).NL化合物(tta=噻吩甲酰三氟丙酮，L表示1，10-二氮杂菲或甲苯基亚砜，n=1或2)中4f-4f发射量子产率(Q)和D-5(0)激发态寿命的实验测定和理论计算。这些化合物的实验Q值随L配体的变化而显著变化。讨论了化合物的发射量子产额与光物理性质的关系，利用配体-稀土离子能量传递过程的理论模型和速率方程的数值解进行了计算，提出了配体与稀土离子之间分子内能量传递过程的途径。对于所分析的化合物，理论计算结果与实验数据吻合较好。(C)2000 Elsevier Science S.A.保留所有权利。
We report the experimental determination and theoretical calculation of the 4f-4f emission quantum yield (q) and D-5(0) excited state lifetime in the Eu (TTA)(3).nL compounds (where TTA=thenoyltrifluoroacetonate, L denotes 1,10-phenantroline orp-tolyl sulfoxide and n=1 or 2). The experimental q values for these compounds vary significantly by changing the L ligand. The relation between the emission quantum yield and photophysical characteristics of the compounds is discussed, The calculations are carded out by using theoretical models for Ligand-rare earth ion energy transfer processes and numerical solutions of the rate equations, Pathways for the intramolecular energy transfer process between the ligands and the rare earth ion are proposed. The theoretical results agree well with the experimental data for the compounds analyzed. (C) 2000 Elsevier Science S.A. All rights reserved.