两种新型磷光金属铱配合物的合成及光电性能研究

以3-甲基-1-(2-氟苯基)咪唑和3-甲基-1-(4-氟苯基)咪唑作为第一配体,2-甲酸吡啶作为第二配体,合成了以铱(III)为内核的两种有机电致磷光材料(o-fpmi)2Ir(pic)(o-fpmi=3-甲基-1-(2-氟苯基)咪唑,pic=2-甲酸吡啶)和(fpmi)2Ir(pic)(fpmi=3-甲基-1-(4-氟苯基)咪唑)。通过核磁1H NMR和液相质谱LC-MS对其结构进行分析确认,并用紫外-可见吸收光谱、荧光发射光谱和循环伏安法测定其光电物理性能,热重分析测定铱配合物的热稳定性。结果表明,(fpmi)2Ir(pic)和(o-fpmi)2Ir(pic)的紫外吸收峰值为231,270,300,360 nm和237,281,315,370 nm,最大荧光发射波长为502 nm和508 nm,主要来源于三重态3MLCT的辐射跃迁,热分解温度为300℃,是一类热稳定性好的蓝绿色发光材料。

Synthesis and properties of two novel phosphorescent iridium complexes

3-Methyl-1-（2-fluorophenyl）imidazole and 3-methyl-1-（4-fluorophenyl）imidazole for the first ligand,2-formylpyridine for the second ligand synthesized two electroluminescent phosphorescent iridium （III）materials（o-fpmi）2 Ir（pic）（o-fpmi = 3-methyl-1-（3-fluorophenyl）imidazole,pic = 2-formylpyri-dine）and（fpmi）2 Ir（pic）（fpmi = 3-methyl-1-（4-fluorophenyl）imidazole）. The compounds are ana-lyzed by 1 H NMR and LCMS. Solubility UV-Vis absorption,fluorescence emission,cyclic voltammetry, thermogravitometric are investigated. The results showed that the UV absorption peak of（fpmi）2 Ir（pic） and（o-fpmi）2 Ir（pic）are 231,270,300,360 nm and 237,281,315,370 nm,the maximum emission wavelength are 502 nm and 508 nm,The TGA thermograms show that the complex have a better perform-ance in thermostability and the decomposition temperature almost up to 300 ℃. These Ir（III）complexes are promising stable blue-gree phosphorescent materials.