Phosphorescent Ir(iii) complexes with both cyclometalate chromophores and phosphine-silanolate ancillary: concurrent conversion of organosilane to silanolateCCDC reference number 905261. For crystallographic data in CIF or other electronic format see DOI: 10.1039/c3dt32408g

• Main Authors: Zhang, Fushi, Wang, Liduo, Chang, Shih-Han, Huang, Kuan-Lin, Chi, Yun, Hung, Wen-Yi, Chen, Chih-Ming, Lee, Gene-Hsiang, Chou, Pi-Tai
• Format: Article
• Language: English
• ISSN: 1477-9226; 1477-9234
• DOI: 10.1039/c3dt32408g

Ir( iii ) metal complexes with general formula [(C^N) 2 Ir(P^SiO)], where (C^N)H is 2-phenylisoquinoline ( 1 ), 2-phenylpyridine ( 2 ) or 2-(2,4-difluorophenyl)pyridine ( 3 ), and (P^SiO)H is an organosilanolate ancillary chelate with either diphenylsilyl ( a ) or dimethylsilyl ( b ) substituent, were synthesized, among which the structure of 3a was also confirmed using single-crystal X-ray diffraction analyses. These complexes exhibit bright phosphorescence in the region of 489-632 nm in solution at room temperature, showing the first successful example of using organosilanolate as an ancillary chelate. For application, organic light emitting diodes (OLEDs) using phosphors 3a and 3b doped in N , N ′-dicarbazolyl-3,5-benzene (mCP) exhibited a maximum brightness of 50 800 cd m −2 at 800 mA cm −2 (12 V) with η ext of 10.1% and a brightness of 45 900 cd m −2 at 700 mA cm −2 (14.5 V) with η ext of 10.2%, respectively. Ir(III) complexes with the general formula [(C^N) 2 Ir(P^SiO)] have been characterized.