吸电子基团调控苯基喹啉类铱配合物的合成及光物理性能
Synthesis and photophysical properties of phenylquinoline iridium complexes controlled by electron-withdrawing groups
作者单位E-mail
常桥稳 昆明贵金属研究所, 昆明贵研新材料科技有限公司, 稀贵金属综合利用新技术国家重点实验室, 云南贵金属实验室有限公司, 昆明 650106  
陈祝安 昆明贵金属研究所, 昆明贵研新材料科技有限公司, 稀贵金属综合利用新技术国家重点实验室, 云南贵金属实验室有限公司, 昆明 650106  
冯璐 吉林大学化学学院, 理论化学研究所, 长春 130023  
姜雯 昆明贵金属研究所, 昆明贵研新材料科技有限公司, 稀贵金属综合利用新技术国家重点实验室, 云南贵金属实验室有限公司, 昆明 650106  
晏彩先 昆明贵金属研究所, 昆明贵研新材料科技有限公司, 稀贵金属综合利用新技术国家重点实验室, 云南贵金属实验室有限公司, 昆明 650106 ycx19860706@163.com 
刘伟平 昆明贵金属研究所, 昆明贵研新材料科技有限公司, 稀贵金属综合利用新技术国家重点实验室, 云南贵金属实验室有限公司, 昆明 650106  
白福全 吉林大学化学学院, 理论化学研究所, 长春 130023 Baifq@jlu.edu.cn 
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)、CF33))。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P1,呈稍微扭曲的八面体构型。配合物123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12的发射波长发生了显著的蓝移
关键词: 铱(Ⅲ)配合物  磷光材料  苯基喹啉  吸电子基团  光物理性能
基金项目: 国家自然科学基金(No.21861023)、中央引导地方自由探索项目(No.202207AA110006)、云南省自然科学基金重点项目(No.2019FA047)、云南贵金属实验室科技计划项目(No.YPML-2022050230)、云南省创新引导与科技型企业培育计划(No.202004AR040001)和云南省金属有机分子材料与器件重点实验室(No.202205AD160053)资助
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 P1 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 MeO 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.
Keywords: iridium(Ⅲ) complexes  phosphorescent materials  phenylquinoline  electron-withdrawing group  photophysical properties
投稿时间:2022-07-14 修订日期:2022-11-15
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常桥稳,陈祝安,冯璐,姜雯,晏彩先,刘伟平,白福全.吸电子基团调控苯基喹啉类铱配合物的合成及光物理性能[J].无机化学学报,2023,39(2):255-262.
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