新型稀土铕离子四元配合物的制备及荧光性能研究

study on preparation and fluorescent property of quaternary Eu complex

以稀土铕离子为中心离子,2,6-二(4-乙氧基苯甲酰基)吡啶(L)、1,10-邻菲罗啉(Phen)、三苯基氧膦(TPPO)为配体,设计并制备了新型稀土铕离子四元有机配合物EuL(Phen)_(2)TPPO。通过傅里叶变换红外光谱仪、荧光光谱仪对其结构和荧光性能进行表征和分析。结果表明,相比于三元配合物EuL(Phen)_(2),四元配合物EuL(Phen)_(2)TPPO的荧光强度更强;四元配合物在595nm和617nm处都有较强的Eu^(3+)特征发射峰,以617nm处峰值最高,两处的相对荧光强度比值为3.62,说明配合物色纯度较好,是一种较好的红光材料;四元配合物存在溶剂化效应,即极性越小,体系的荧光强度越大。

With rare earth europium(Eu)ion as the central ion,a new type of quaternary europium complex-EuL(Phen)_(2)TPPO was prepared by 2,6-bis(4-ethoxybenzoyl)pyridine(L),1,10-phenanthroline(Phen)and triphenylphosphine oxide(TPPO)as ligand.The structure was characterized by FT-IR.The fluorescence intensity of the complex was studied by fluorescence spectrometer.The results showed that compared with the ternary complex EuL(Phen)_(2),the fluorescence intensity of EuL(Phen)_(2)TPPO was stronger.The quaternary Eu complex had strong Eu^(3+)emission peaks at 595nm and 617nm,and the fluorescence intensity of 617nm was the best.The ratio of peak intensity was 3.62.It showed that the complex had good monochromaticity,which can be used as eminent red light material.The fluorescence intensity of the solution system was related to the dipole moment polarity of the solvent,the higher polarity resulted in a lower fluorescence intensity.