【摘要】 以2,2,6,6-四甲基庚二酮（tmd）为辅助配体，2,4-二取代基苯基-4-甲基喹啉（2,4-2R-mpq）为主配体，在主配体中苯基的2位和4位同时引入氟（F）、甲氧基（MeO）或三氟甲基（CF₃），合成出3个铱磷光配合物（2,4-2R-mpq）₂Ir（tmd）（R=F （1）、MeO（2）、CF³（3））。通过元素分析、核磁共振谱和单晶X射线衍射表征了配合物的组成和分子结构。通过紫外可见吸收光谱、光致发光光谱和理论计算对配合物的光物理性能进行了研究。结果表明：3个配合物的晶体均为三斜晶系，空间群均为■，呈稍微扭曲的八面体构型。配合物1、2和3在溶液状态下的发射波长分别为570、582和604 nm，溶液中量子产率分别为96%、80%和80%。在主配体中苯基的2位和4位同时引入F或MeO，配合物电子云发生聚集，而引入CF₃，配合物的电子云分散。与配合物3相比，配合物1和2的发射波长发生了显著的蓝移。更多还原

【Abstract】 To study the effect of substituents on iridium phosphorescent complexes,fluorine,methoxy,or trifluoromethyl were introduced into positions 2 and 4 of phenyl at the same time to obtain 2,4-disubstituted phenyl-4-methylquinoline （2,4-2R-mpq）.Three new iridium phosphorescent complexes （2,4-2R-mpq）₂Ir（tmd）（R=F（1）,MeO（2）,CF₃（3）） were synthesized by using 2,2,6,6-tetramethylheptanedione （tmd） as the auxiliary ligand,and 2,4-2R-mpq with the electron-withdrawing group as the main ligands.The compositions and chemical structures of the complexes were characterized by elemental analysis,NMR spectroscopy,and single-crystal X-ray diffraction.The three iridium complexes belong to the triclinic system with the ■ space group.The photophysical properties of the complexes were studied by UV-Vis absorption spectroscopy,photoluminescence spectroscopy,and theory calculation.The results indicate that complexes 1,2,and 3 with the photoluminescence quantum yields of 96%,80%,and 80% exhibited maximum emission peaks at 570,582,and 604 nm,respectively.When F and Me O are introduced into the 2 and 4 positions of phenyl on the main ligand,the electron cloud of complexes 1 and 2 are aggregated,while the CF₃ is introduced,and the electron cloud of the complex is dispersed.Compared with complex 3,the emission wavelengths of complexes 1 and 2 had a significant blue shift.Different from traditional cognition,the methoxyl group represents an electron-withdrawing group.CCDC:2217725,1;2217726,2;2217727,3.更多还原