Enhanced luminescence of Eu³⁺ by Y³⁺ in ternary complexes Eu_XY_1−X(TTA)₃Dipy

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• 作者：Yuguang Lv ; Jingchang Zhang ; Weiliang Cao ; Joon Ching Juan ; Fujun Zhang ; Zheng Xu
• 关键词：Eu_XY₁₋ ; X(TTA)₃Dipy ; Synthesis ; Energy transfer ; Electroluminescence
• 刊名：Spectrochimica Acta Part A ; Molecular and Biomolecular Spectroscopy
• 出版年：2007
• 期刊代码：99_13861425
• 类别：ch
• 出版时间：October 2007
• 卷：68
• 期：2
• 页码：382-386
• 文件大小：609 K

摘要

Rare-earth ternary complexes Eu_XY_1−X(TTA)₃Dipy {X = 0, 0.1, 0.25, 0.5, 0.75, 0.9, 1.0, using thenoyltrifluoroacetone (TTA) as ligand and 2,2′-dipyridyl (Dipy) as synergic agent} were synthesized. Characterization with X-ray diffraction (XRD), IR and elemental analysis had also been carried out. The photophysical properties of these complexes were studied in detail with ultraviolet absorption spectra and fluorescent spectra. It is found that the enhanced luminescence of Eu³⁺ ions by Y³⁺ ions occurs in ternary complexes. And we monitored the spectra of Eu_XY_1−X(TTA)₃Dipy (PVK:Eu/BCP/AlQ/Al) at the different rate (rpm). The results showed that the Y³⁺ ion acts as an energy transfer bridge that helps energy transfer from PVK to Eu³⁺.