一种基于咪唑-咔唑蓝色荧光材料的合成及性能研究

摘要

A blue fluorescent material 2-[4- (4- (9H-carbozol-9-yl) phenyl) phenyl]-4, 5-diphenyl-1H-imidazole had been synthesized by suzuki coupling of 4- (9H-carbozol-9-yl) phenylboronic acid with 4, 5-diphenyl-2- (4-bromophenyl) imidazole, which prepared from a benzil, 4-bromobenzaldehyde and an ammonium acetate by condensation reaction.The structure was characterized by IR, 1H NMR, 13C NMR and MS.The optical properties, electrochemical behaviour and thermal stability of the target product were investigated by UV-Vis absorption spectra, fluorescence emission spectra, cyclic voltammetry, TGA, DSC and theoretical calculations.The results indicated that the UV-Vis absorption peaks were observed at 341 nm, and the fluorescence emission peaks were showed at 416 nm.The HOMO and LUMO energy levels of the target product were estimated to be 5.29 eV and 2.11 eV, respectively.TGA and DSC analysis showed that the target product possesses good thermal stability.%联苯甲酰、对溴苯甲醛和乙酸铵缩合得到2- (4-溴苯基) -4, 5-二苯基咪唑, 再与4- (9H-咔唑-9-基) 苯硼酸通过Suzuki偶联反应合成一种蓝色荧光材料4, 5-二苯基-2-[4- (4- (9H-咔唑-9-基) 苯基) 苯基]-1H-咪唑, 其结构经IR、1H NMR、13C NMR和MS表征.利用紫外-可见吸收光谱、荧光光谱、循环伏安法、TGA、DSC和理论计算研究了化合物的光学、电化学和热稳定性能.结果表明:化合物的最大吸收波长为341 nm, 荧光发射波长为416 nm, HOMO和LUMO轨道能级分别为5.29 eV和2.11 eV.TGA和DSC测试结果表明该化合物具有良好的热稳定性能.