Functionalized coumarin derivatives containing aromatic-imidazole unit as organic luminescent materials
作者:Youjia Wang、Yanmei Li、Tianzhi Yu、Wenming Su、Hailin Ma、Yuling Zhao、Xinyu Li、Hui Zhang
DOI:10.1016/j.dyepig.2019.107958
日期:2020.2
new coumarin derivatives containing aromatic-imidazole unit (i.e., benzo[d]imidazole, phenanthro[9,10-d]imidazole and pyreno[4,5-d]imidazole), 3-(1-phenyl-1H-benzo[d]imidazole-2-yl)-7-(diethylamino)coumarin (BI–C), 3-(1-(4-(tert-butyl)phenyl)-1H-phenanthro[9,10-d]imidazole-2-yl)-7-(diethylamino)coumarin (PI–C) and 3-(9-(4-(tert-butyl)phenyl)-9H-pyreno[4,5-d]imidazole-10-yl)-7-(diethylamino)coumarin (PyI-C)
三种含有芳族咪唑单元的新香豆素衍生物(即苯并[ d ]咪唑,菲[ 9,10- d ]咪唑和吡啶并[4,5- d ]咪唑),3-(1-苯基-1 H-苯并[ d ]咪唑-2-基)-7-(二乙氨基)香豆素(BI–C),3-(1-(4-(叔丁基)苯基)-1 H-菲基[9,10- d ]咪唑-2-基)-7-(二乙氨基)香豆素(PI–C)和3-(9-(4-(叔丁基)苯基)-9 H-吡喃并[4,5- d ]咪唑-10-基)-7-(二乙氨基)香豆素(PyI-C),已成功地准备好用于有机发光器件。这些化合物由于刚性多芳族咪唑骨架的π共轭扩展而显示出良好的热性能和从蓝绿色到绿色的强烈发射,并且在氯仿溶液中具有94%,97%和98%的高光致发光量子效率。在这些化合物中,由化合物PI-C制成的掺杂的有机发光器件表现出6.07cd / A的最大发光效率和2.78%的最大EQE。