Photoacoustic spectroscopy study on the co-fluorescence effect of Eu3+–La3+–Hba solid complexes
作者:Yue-tao Yang、Shu-yi Zhang
DOI:10.1016/s0022-3697(03)00157-4
日期:2003.8
Abstract The photoacoustic (PA) spectra of Eu 3+ –La 3+ –Hba complexes are reported (Hba: benzoic acid). It is found that the PA intensity of the ligand bears a relation to the energy transfer processes. For Eu 3+ –La 3+ –Hba coprecipitates, with increasing the concentration of La 3+ , the PA intensity in the region of the ligand absorption decreases firstly, then increases. It is indicated that the
摘要 报道了 Eu 3+ -La 3+ -Hba 配合物(Hba:苯甲酸)的光声 (PA) 光谱。发现配体的PA强度与能量转移过程有关。对于Eu 3+ -La 3+ -Hba 共沉淀物,随着La 3+ 浓度的增加,配体吸收区域的PA 强度先减小后增大。表明第二稀土离子La 3+ -的加入改变了配合物的弛豫过程。结果表明,荧光光谱的变化与 PA 光谱互补。讨论了共沉淀物中的分子内能量转移和分子间能量转移过程。