新氮杂冠醚稀土配合物的制备、表征及其荧光性质  

Synthesis, Characterization and Luminescent Properties of Lanthanide Complexes with New Diaza-Crown

作　　者：范丽岩[1] 阎兰[1] 胡晓黎[1] 杨汝栋[1] 

机构地区：[1]兰州大学化学化工学院,甘肃兰州730000

出　　处：《中国稀土学报》2001年第5期467-470,共4页Journal of the Chinese Society of Rare Earths

基　　金：国家自然科学基金资助项目 ( 95 730 0 5 )

摘　　要：合成了一新的大环氮杂冠醚及其稀土配合物 ,并通过元素分析、摩尔电导、热分析及红外的测定对配合物进行了表征。结果表明 ,冠醚配体上的C和N原子均参与配位 ,并推测了配合物的可能组成。室温下研究了配合物的固体及在溶液中的荧光光谱。固态时Sm3 +,Eu3 +,Tb3 +,Dy3 +的冠醚配合物均有较强荧光 ,其中Tb3 +的荧光强度最高 ,表明冠醚配体三重态的能量与Tb3 +的振动能级更为匹配。在Eu3 +配合物中 ,强度比 η( 5D0 →7F2 / 5D0 →7F1 ) =5 .3,表明Eu3 +处于一非对称配位环境中。A new macrocyclic crown ether and a series of its complexes with rare earth elements were synthesized. All these compounds were characterized by elementalanalysis, molar conductivity, thermoanalysis and IR spectroscopy. The analytical results indicate that oxygen and nitrogen atoms coordinate with rare earth ions, Based on these data, a prediction of its possible structure was made. The fluorescence spectra of the complexes in solid phase and in DMSO solution were studied. The complexes with Sm 3+ , Eu 3+ , Tb 3+ , Dy 3+ have strong luminescence intensity, among which complex with Tb 3+ has the strongest luminescence intensity. It shows that the ligand triplet state energy matches with the Tb 3+ vibration energy level. In the comples with Eu 3+ , η ( 5D 0→ 7F 2/ 5D 0→ 7F 1) is 5.3, which indicates that Eu 3+ atom is at the center of asymmetric coordination field.

关 键 词：稀土 氮杂冠醚 配合物 荧光性质 合成 表征 

分 类 号：O614.33[理学—无机化学]