151. Cyclometallated iridium(III) complexes with dicyanamide or tricyanomethanide
- Author
-
Zhong-Ning Chen, Li-Yi Zhang, Lin-Xi Shi, and Xu Zhang
- Subjects
Inorganic chemistry ,chemistry.chemical_element ,Electrochemistry ,Chloride ,Inorganic Chemistry ,chemistry.chemical_compound ,chemistry ,Polymer chemistry ,Materials Chemistry ,medicine ,OLED ,2-Phenylpyridine ,Iridium ,Physical and Theoretical Chemistry ,Spectroscopy ,Luminescence ,Dicyanamide ,medicine.drug - Abstract
Reaction of cyclometallated iridium(III) complex Ir(ppy)2(PPh3)Cl (2, ppy = 2-phenylpyridine) with dicyanamide or tricyanomethanide gave neutral mononuclear complexes Ir(ppy)2(PPh3)N(CN)2 (3a) or Ir(ppy)2(PPh3)C(CN)3 (3b), and dicyanamide/tricyanomethanide-linked binuclear iridium(III) complexes [{Ir(ppy)2(PPh3)}2N(CN)2]+ (4a) or [{Ir(ppy)2(PPh3)}2C(CN)3]+ (4b). Substitution of coordinated chloride in the precursor 2 with dicyanamide or tricyanomethanide improved significantly the luminescence properties of 3a–4b. Compared with that in the precursor 2 (1.6%), 2.2 to 9.3-fold enhancement of emission quantum yields was detected in 3a–4b.
- Published
- 2009