一种新型金属铱(Ⅲ)有机配合物的光谱特性研究

Spectral Characteristics of a New Iridium(Ⅲ) Organic Complex

针对一种合成的新型金属铱(Ⅲ)有机配合物的光谱特性进行了研究。实验中,该配合物的配体为苯基喹啉和异丁基酰苯胺。紫外—可见吸收光谱研究表明,该配合物分别在225 nm、267 nm、339 nm以及460 nm附近出现较强吸收峰,其中在320 nm～580 nm范围内,存在着单线态和三线态的金属铱到配体的电荷跃迁。发光光谱测试表明,随着溶液中(二氯甲烷作为溶剂)该新型金属铱(Ⅲ)有机配合物浓度的增加,溶液的发光光谱峰值位置不断发生红移。当处在460 nm激发波长下,溶剂二氯甲烷发光光潜没有出现明显的峰值强度。排除了溶剂对发光光谱测量的影响,直接测量山该配合物在606 nm附近有强的金属三线态磷光发射。因此,该配合物有望成为一种可用于有机电致发光领域的新型磷光材料。

A new phosphorescent （pq）2Ir（N-phenyl-isobutyramide） complex is synthesized and its spectral characteristics are investigated. The ligands of this complex are phenyl-quinoline and N-phenyl-isobutyramide. The complex is characterized by UV-Vis absorption spectrometry and luminescence spectrometry, and the results show that strong absorption appeared at about 225 nm, 267 nm, 339 nm and 460 nm, respectively. Especially the complex shows single and triplet metal-to-ligand charge transfer from 320 nm to 580 nm. The luminescence spectra indicate that the increase in concentration of the iridium （Ⅲ） organic complex in the solution with the solvent of CH2Cl2 leads to red shift of luminescence spectra. At the excitation wavelength of 460 nm, the luminescence interference of dichloromethane is absent, so the strong metal triplet phosphorescence at around 606 nm of the Ir（Ⅲ） organic complex was generated by itself. Therefore, we conclude that the Ir（Ⅲ） organic complex can be used as a new phosphorescent material for the application in organic electroluminescence area.