Synthesis and photoelectric properties of Ir<sup>III</sup> complexes using fluorobenzylimidazole[2,1-<i>b</i>]thiazole derivatives as primary ligands
作者:Peng-bin Si、Hai-feng Zhe、Ai-hui Zhou、Xiao-qing Liu、Ming-yu Teng、Mei-zhu Rong、Yu-fei Wang、Qin Wang、Zheng-liang Wang、Jie Zhang
DOI:10.1039/d1nj03784f
日期:——
3-Methyl-6-(3,5-difluorophenyl)imidazo[2,1-b]thiazole (mdfpit) and 3-methyl-6-(3,4,5-trifluorophenyl)imidazo[2,1-b]thiazole (mtfpit) were easily prepared from thiourea, acetone, and 3,5-difluorobenzoyl bromide or 3,4,5-trifluorobenzoyl bromide. These were used as primary ligands to synthesize twelve phosphorescent IrIII complexes with picolinic acid (pic), isoquinoline-3-carboxylic acid (3-IQA), q
3-甲基-6-(3,5-二氟苯基)咪唑并[ 2,1- b ]噻唑(mdfpit)和3-甲基-6-(3,4,5-三氟苯基)咪唑并[2,1- b ]噻唑(mtfpit) 很容易从硫脲、丙酮和 3,5-二氟苯甲酰溴或 3,4,5-三氟苯甲酰溴制备。这些被用作主要配体来合成十二个磷光 Ir III与吡啶甲酸 (pic)、异喹啉-3-羧酸 (3-IQA)、喹啉-2-羧酸 (2-QA)、2-(吡啶-2-基)苯酚 (2-ylppy)、2- (2,4-二氟苯基)吡啶(dfppy)和吡啶-2-磺酸(2-sappy)作为辅助配体。研究了它们的结构、光致发光和电化学性质。在主配体的苯环中引入更多的氟原子后,所得Ir III配合物的热稳定性、光致发光量子产率(PLQY)、LUMO能级和发光效率显着提高,光致发光发射光谱呈蓝色-转移了。它们的最大发射波长在 517-618 nm 范围内,发光颜色从绿光到红光范围。使用合成的