新型含苯并唑类铱配合物的合成及其发光性能

Synthesis and Photophysical Properties of Novel Cyclometalated Benzazole-based Iridium(Ⅲ) Complexes

以2-溴-9-乙基-9H-咔唑为原料,首先与联硼酸频那醇酯经宫浦硼基化反应制得相应的有机硼产物,再与溴代物发生传统的铃木偶联反应合成了3种新型的环金属配体(3a^3c);3a^3c依次与三氯化铱及传统辅助配体乙酰丙酮反应合成了3个新型含苯并唑类(苯并恶唑、苯并噻唑和苯并吡唑)环金属铱配合物(4a^4c),其结构经~1H NMR和MS(ESI或FAB)表征。并对其紫外和荧光光谱进行了研究。结果表明:4a^4c由于主配体的结构微调,可实现发光颜色由黄绿色到橙色的调控。

Three novel cyclometalated ligands （3a - 3c）were prepared by Miyaura borylation reaction and Suzuki coupling reaction from 2-bromo-9-ethyl-9H-earbazole. Three novel eyclometalated benzox- azole-based （benzoxazole, benzothiazole and indazole） iridium （III） complexes （ 4a -4c） were synthe- sized by reaction of 3a - 3c with iridium chloride and acetylacetone successively. The structures were characterized by 1H NMR and MS（ESI or FAB）. The photophysical properties of 4a - 4c were studied by UV-Vis absorption and emission spectra. The results showed that the phosphorescent emission of 4a - 4c can be realized from yellow green to orange, which is mainly dependent on the main ligand structure.