【作者】 丛晓庆；

【导师】 魏长平；

【作者基本信息】 长春理工大学 ， 应用化学， 2007， 硕士

【摘要】 本论文制备了：1)有机电致发光材料的中性配体2-苯基咪唑[4，5-f]1，10-邻菲罗啉（PIP）；2)4个稀土(Tb³⁺、Eu³⁺、Sm³⁺、Dy³⁺)苯甲酸（HBA）2-苯基咪唑[4，5-f]1，10-邻菲罗啉三元配合物；3)3个稀土Tb³⁺（苯甲酸（HBA）、柠檬酸（H₃Cit）、乙酰丙酮（Hacac））1，10-邻菲罗啉（phen）三元配合物；4)7个乙酰丙酮铽掺杂铕系列的稀土四元有机配合物。采用红外光谱对上述样品的组成和结构进行了表征，结果表明，稀土离子与配体之间发生了作用。研究了配体及稀土有机配合物的紫外-可见吸收光谱，结果表明，配体与稀土有机配合物在200～400nm范围内有较强的吸收峰；配合物的紫外吸收主要是配体的吸收：配合物的荧光是通过分子内的能量传递产生的。 在紫外光激发下，配合物中的配体可将吸收的能量传递给稀土离子，表现出较强的稀土离子的特征发射。在稀土Tb³⁺（苯甲酸、乙酰丙酮、柠檬酸）1，10-邻菲罗啉三元配合物中，发光强度大小是Tb（acac）₃phen＞Tb（BA）₃phen＞Tb（Cit）phen；而在稀土(Tb³⁺、Eu³⁺、Sm³⁺、Dy³⁺)苯甲酸2-苯基咪唑[4，5-f]1，10-邻菲罗啉三元配合物中，Eu(BA]₃PIP的荧光强度明显大于其它几个配合物的荧光强度，说明合适的第二配体对配合物有很好的敏化发光作用。在乙酰丙酮铽掺杂铕系列的稀土四元有机配合物中，Tb³⁺对Eu³⁺的荧光发射表现出很强的敏化作用，而Eu³⁺对Tb³⁺的荧光发射有很强的猝灭作用。更多还原

【Abstract】 In this dissertation: 1) neutral ligand 2-Phenyl-imidazo[4, 5-f]1, 10-Phenanthroline （PIP） with high purity was synthesized; 2) 4 ternary complexes of rare earth (Tb³⁺, Eu³⁺, Sm³⁺, Dy³⁺) with benzojc acid （HBA） as the first ligand and PIP as the secondary ligand were prepared; 3) 3 complexs of rare earth Tb³⁺ with benzojc acid, citric acid （H₃Cit）, acetylacetone （Hacac） as the first ligand and 1,10-Phenanthroline （phen） as the secondary ligand were prepared; 4) 7 complexes of Tb（III）-acetylaceton-ate doped rare earth Eu³⁺ were prepared. The compositions of complexes were characterized by IR spectra. The results indicate that rare earth ions are coordinated with the ligands. UV spectras show that the ligands and rare earth organic complexes have sharp absorptions in the range of 200～ 400nm that were made mainly by the ligands.Under UV excitation, energy absorbed by the ligands in the complexes can be transmitted to the rare earth ions so that the rare earth ions can emit their characteristic fluorescence. The fluorescence intensity of rare earth Tb³⁺ complexes with （benzojc acid, citric acid, acetylacetone） as the first ligand and 1, 10-Phenanthroline （phen） as the secondary ligand is Tb（acac）3phen>Tb（BA）3phen>Tb（Cit）phen. The fluorescence intensity of Eu（BA）3PIP is obviously higher than the other complexes of rare earth (Tb³⁺, Sm³⁺, Dy³⁺) with benzojc acid as the first ligand and 2-Phenyl-imidazo[4, 5-f]1, 10-Phenanthroline as the secondary ligand. The results indicate that the fluorescence of complexes can be greatly sensitized by appropriate secondary ligand. Among the complexes of Tb（III）-acetylacetone doped rare earth Eu³⁺, the fluorescence emission of Eu³⁺ is greatly sensitized by Tb³⁺ and that of Tb³⁺ were strongly quenched by Eu³⁺.更多还原