Color tuning of iridium complexes – Part I: Substituted phenylisoquinoline-based iridium complexes as the triplet emitter

• Published in: Inorganica Chimica Acta 2006-01, Vol.359 (2), p.441-450
• Main Authors: Fang, Kai-Hung, Wu, Li-Lan, Huang, Yu-Ting, Yang, Cheng-Hsien, Sun, I-Wen
• Format: Article
• Language: English
• Subjects: Iridium complexes; Isoquinoline; OLEDs; Red emitter
• ISSN: 0020-1693; 1873-3255
• DOI: 10.1016/j.ica.2005.10.003

A series of new iridium complexes with isoquinoline derivative ligands were synthesized for application in organic light-emitting diodes (OLEDs). It is demonstrated that varying the substituents at the 2′- or 4′-positions of the isoquinoline ligand makes the color tuning possible. All of these complexes are suitable for the red phosphorescent materials in OLEDs. A series of new iridium complexes with isoquinoline derivative ligands were synthesized for application in organic light-emitting diodes (OLEDs). It is demonstrated that varying the substituents at the 2′- or 4′-positions of the isoquinoline ligand makes the color tuning possible. Because of the steric effect, the 6′-substituted complexes: bis[1-(6′-methyl)phenylisoquinolinato-N,C 2′] iridium(III) (acetylacetonate) ( 6b1), bis[1-(6′-trifluoromethyl)phenylisoquinolinato-N,C 2′] iridium(III) (acetylacetonate) ( 6b2), and bis[1-(6′-methoxy)phenylisoquinolinato-N,C 2′] iridium(III) (acetylacetonate) ( 6b3) show red-shift effect with respect to the 4′-substituted complexes: bis[1-(4′-methyl)phenylisoquinolinato-N,C 2′] iridium(III) (acetylacetonate) ( 6a1), bis[1-(4′-trifluoromethyl)phenylisoquinolinato-N,C 2′] iridium(III) (acetylacetonate) ( 6a2), and bis[1-(4′-methoxy)phenylisoquinolinato-N,C 2′] iridium(III) (acetylacetonate) ( 6a3). All of these complexes are suitable for the red phosphorescent materials in OLEDs.