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1. 中国东港工贸集团公司,浙江 台州,318000
2. 南开大学 材料化学系 天津,300071
3. 邹平戴溪中学, 山东 滨州 256200
收稿日期:2009-10-20,
修回日期:2010-04-14,
网络出版日期:2010-08-27,
纸质出版日期:2010-08-27
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颜剑波, 豆丽靖, 段春光, 王云友, 孙 波. 双核稀土配合物的合成表征及其光学性能[J]. 发光学报, 2010,31(4): 573-579
YAN Jian-bo, DOU Li-jing, DUAN Chun-guang, WANG Yun-you, SUN Bo. Synthesis, Characterization and Luminescence Properties of Dinuclear Lanthanide Complexes[J]. 发光学报, 2010,31(4): 573-579
合成了一种新的双二酮配体1
4-二苯甲酰乙酰苯(TDAP)
并成功合成了它的两个双核稀土配合物Eu
2
(TDAP)
3
(H
2
O)
2
和Tb
2
(TDAP)
3
(H
2
O)
6
。通过元素分析、红外光谱、紫外可见光谱和荧光光谱对配合物进行了表征与性能研究。荧光分析表明
在紫外灯下配体本身就发出蓝紫色荧光
通过对配体TDAP的磷光光谱分析计算得到了配体的平均三重态能级。配合物Eu
2
(TDAP)
3
(H
2
O)
2
的发射光谱分析表明
配体自身的发射几乎完全被淬灭
能量成功传递给了中心离子
因此配合物发出了明显的特征峰
主发射峰为Eu
3+
的
5
D
0
-
7
F
2
发射。由荧光分析知
配合物Eu
2
(TDAP)
3
(H
2
O)
2
的激发光谱与配体发射光谱的重叠
这验证了配体TDAP对于Eu
3+
能量传递的有效性。此外
还详细分析了两种配合物的能量传递过程及发光机理
配合物Tb
2
(TDAP)
3
(H
2
O)
6
几乎不发光
这是因为配体的三重态能级与Tb
3+
的最低激发态能级不匹配。合成的配合物Eu
2
(TDAP)
3
(H
2
O)
2
有很强荧光
是一种有效的红色发光材料。
Two new complexes of Eu(Ⅲ) and Tb(Ⅲ) chelated with bis(-diketone) terephthaloyl-diacetophenone (TDAP) were successfully synthesized. The samples were characterized by the element analysis
infrared spectra
UV-Vis spectra
1
H NMR and fluorescence spectra. The results indicated that their compositions are Eu
2
(TDAP)
3
(H
2
O)
2
and Tb
2
(TDAP)
3
(H
2
O)
6
respectively. Photoluminescence measurement indicated that TDAP is a good indigo emitter under UV radiation. The average triplet state energy of the ligand was obtained by analyzing the phosphorescence spectrum of TDAP. The Eu(Ⅲ) complexes display characteristic metal-centered luminescence
while the ligand emissions are completely quenched. The results indicated that the efficient ligand-to-metal energy transfer (antenna effect) occurs. The characteristic red emission appears due to the
5
D
0
7
F
j
transitions of the 4f electrons of the central Eu
3+
ions. Tb
2
(TDAP)
3
(H
2
O)
6
has poor fluorescence property
this is because the triplet state energy of the ligand does not match with the lowest excited state energy of Tb
3+
ions. The possible energy transfer mechanism was investigated.
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