Phosphorescent cationic iridium(III) complexes with cyclometalating 1H-indazole and 2H-[1,2,3]-triazole ligands

Two new cationic iridium(III) complexes with cyclometalating 1-phenylindazole or 2-phenyl-1,2,3-triazole ligands, [(C^N)2Ir(4,4′-di-tert-butyl-2,2′-dipyridyl)](PF6), exhibit yellow or green phosphorescence with quantum yields and excited state lifetimes of up to 45% and 840 ns in argon-saturated dichloromethane solution at room temperature.

Graphical abstractNew cationic Ir(III) complexes [(C^N)2Ir(4,4′-di-tert-butyl-2,2′-dipyridyl)](PF6) show yellow or green phosphorescence at ambient conditions.Figure optionsDownload full-size imageDownload as PowerPoint slideHighlights► Cyclometalating 1-phenylindazole and 2-phenyl-1,2,3-triazole ligands (C^N). ► Two new cationic Ir(III) complexes [(C^N)2Ir(4,4′-di-tert-butyl-2,2′-dipyridyl)](PF6). ► New complexes exhibit yellow or green phosphorescence at ambient conditions.