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内蒙古大学 化学化工学院, 内蒙古 呼和浩特 010021
收稿:2011-05-18,
修回:2011-6-12,
网络首发:2011-09-22,
纸质出版:2011-09-22
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李海燕, 赵永亮, 张雁冰. 2,4,6-三吡啶基三嗪-芳香羧酸镝配合物的合成及其荧光性能[J]. 发光学报, 2011,32(9): 869-873
LI Hai-yan, ZHAO Yong-liang, ZHANG Yan-bing. Synthesis and Fluorescence Properties of Complexes of Dysprosium with 2,4,6-tris-(2-pyridyl)-s-triazine[J]. Chinese Journal of Luminescence, 2011,32(9): 869-873
分别以2
4
6-三吡啶基三嗪(TPTZ)、对羟基苯甲酸和对苯二甲酸为配体
以Dy
3+
为中心合成了不同组成的5种配合物。对其进行了元素分析、紫外光谱、红外光谱、荧光激发和发射光谱的测定。推测配合物的组成分别为: (1)Dy(TPTZ)(NO
3
)
3
(C
2
H
5
OH )
&
middot;H
2
O;(2)Dy(TPTZ)
2
(NO
3
)
3
(C
2
H
5
OH )
&
middot;H
2
O;(3)Dy
2
(TPTZ)(NO
3
)
6
(C
2
H
5
OH )
&
middot;2H
2
O; (4)Dy(TPTZ)(C
7
H
5
O
3
)
3
(C
2
H
5
OH)
&
middot;2H
2
O; (5)Dy
2
(TPTZ)
2
-(C
8
H
4
O
4
)(NO
3
)
4
(C
2
H
5
OH )
&
middot;H
2
O。硝酸根的氧原子、芳香酸的羧基氧和稀土离子配位
TPTZ以主配位点和中配位点的氮原子与稀土离子成键。配合物的形成对配体的共轭
&
pi;-
&
pi;
*
跃迁影响不大。荧光强度测试表明
硝酸根、不同的芳香羧酸作为阴离子配体的镝配合物的发光强度有很大差别。芳香羧酸配体对镝配合物的荧光增强最大
镝离子浓度高
荧光强度也高。配合物(2)荧光强度大于配合物(1)
配合物(3)荧光强度大于配合物(2)
可见配体TPTZ多或者发光离子浓度高则配合物发光强度高;配合物(4)荧光强度强于配合物(1)
表明对羟基苯甲酸吸收和传递光能强于硝酸根;配合物(5)的荧光强度是5个配合物中最高的
表明对苯二甲酸三重态能级与Dy
3+
的最低激发态能级匹配
对光的吸收和传递也好
同时也看出发光的Dy
3+
离子量增加
配合物
的发光强度增强。
paper
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