发光学报, 2010, 31 (2): 279, 网络出版: 2010-05-31
新型蓝色有机电致磷光配合物二(2-二氟苯基-4-甲基吡啶)[2-(2′-吡啶基)咪唑]合铱的合成及光谱学性能
Synthesis and Spectroscopic Properties of New Blue-phosphorescent Iridium Complexes Based on 2-difluorophenyl-4-methylpyridine and 2-(pyridyl-2-yl) Imidazole as Ligands
铱配合物 蓝色电致发光材料 有机电致磷光材料 iridium complexes blue electroluminescent materials organic phosphorescent emitting materials
摘要
合成了三个以含氟苯基吡啶及吡啶基咪唑为配体的蓝色磷光电致发光铱配合物(P)2Ir(pym),其中主配体(P)分别为2-(2′,4′-二氟苯基)-4-甲基吡啶、2-(3′,4′-二氟苯基)-4-甲基吡啶、2-(3′,5′-二氟苯基)-4-甲基吡啶;辅助配体pymH为2-(2′-吡啶基)咪唑。通过元素分析、核磁、质谱、红外进行结构表征;用紫外可见吸收光谱、荧光光谱以及循环伏安进行其光谱学性能表征。以pymH取代辅助配体picH(2-吡啶甲酸)的方法,得到含吡啶基咪唑的铱配合物,在室温下二氯甲烷溶液中获得强的蓝光发射,其最大发光波长分别是461,480,490 nm,其中(46f2pmpy)2Ir(pym)较经典蓝光磷光材料FIrpic蓝移5 nm。
Abstract
Three new blue phosphorescent iridium complexes containing 2-(difluorophenyl)-4-methylpyridine as the cyclometalated ligands and 2-(pyridyl-2-yl)imidazole as an ancillary ligand have been synthesized and characterized. The complexes have the general structure (P)2Ir(pym), where P is cyclometalating ligand 2-(2,4-difluorophenyl)-4-methylpyridine(24f2pmpyH),2-(3,4-difluorophenyl)-4-methylpyridine (34f2pmpyH) and 2-(3,5-difluorophenyl)-4-methylpyridine (35f2pmpyH), pym is 2-(pyridyl-2-yl) imida-zole (pymH). Their structures were identified by FTIR, 1H-NMR, MS and elemental analysis. The absorption, emission, and cyclic voltammetry of the complexes were systematically investigated. By replacing the ancillary ligand pic with pym can finely tune emission of the iridium complexes, showing blue luminescence wavelength peaked at 461, 480, 490 nm at room temperature in CH2Cl2. The (46f2pmpy)2Ir(pym) shows 5 nm blue shift in comparison with FIrpic in CH2Cl2 solution.
周瑞, 宋新潮, 田杰, 王歌扬, 王子俊, 徐茂梁, 胡琳琳. 新型蓝色有机电致磷光配合物二(2-二氟苯基-4-甲基吡啶)[2-(2′-吡啶基)咪唑]合铱的合成及光谱学性能[J]. 发光学报, 2010, 31(2): 279. ZHOU Rui, SONG Xin-chao, TIAN Jie, WANG Ge-yang, WANG Zi-jun, XU Mao-liang, HU Lin-lin. Synthesis and Spectroscopic Properties of New Blue-phosphorescent Iridium Complexes Based on 2-difluorophenyl-4-methylpyridine and 2-(pyridyl-2-yl) Imidazole as Ligands[J]. Chinese Journal of Luminescence, 2010, 31(2): 279.