两种黄绿光铱配合物的合成及光物理性质研究

Synthesis and photophysical properties of two yellow-green iridium complexes

以2-苯基-6-(三氟甲基)-苯并噻唑和5,7-二氟-2-苯基苯并噻唑为主配体,分别与辅助配体三苯基膦合成了两种新型的环金属铱配合物(Ir1和Ir2)。用核磁共振氢谱(^(1)H-NMR)和质谱(MS)进行表征并确认其结构。用紫外吸收光谱以及荧光发射光谱研究了它们的光物理性质,Ir1和Ir2的最大发射波长分别为548和546 nm,发黄绿光,相对量子产率为41.1%和69.2%,荧光寿命分别为0.65和0.66μs。密度泛函理论(DFT)计算表明紫外最大吸收峰和荧光发射峰均归因于MLCT/ILCT跃迁。

Two novel cyclometallic iridium complexes(Ir1 and Ir2)were synthesized using 2-phenyl-6-(trifluoromethyl)-benzo[d]thiazole/5,7-difluoro-2-phenylbenzo[d]thiazole as main ligands and triphenyl-phosphine as an auxiliary ligand.Their chemical structures were characterized by nuclear magnetic resonance hydrogen spectrum(1H-NMR)and mass spectrometry(MS).Their photophysical properties were studied by ultraviolet absorption spectroscopy and fluorescence emission spectroscopy.Complexes Ir1 and Ir2 emit yellow-green photoluminescence,and the maximum emission wavelengths are 548 and 546 nm,respectively.Their relative quantum yields are 41.1/69.2%and fluorescence lifetimes are 0.65/0.66μs,respectively.Density functional theory(DFT)calculations indicated that maximal absorption wavelengths and fluorescence emission peaks were attributed to MLCT/ILCT transitions.