title: Phosphorescent Ir(III) complexes with both cyclometalate chromophores and phosphine-silanolate ancillary: concurrent conversion of organosilane to silanolate.
abstract: Ir(III) metal complexes with general formula [(C^N)2Ir(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.
authors.affiliation: Department of Chemistry, Tsinghua University, Beijing 100084, China. zhangfs@mail.tsinghua.edu.cn
authors.forename: Fushi
authors.initials: F
authors.lastname: Zhang
authors.forename: Liduo
authors.initials: L
authors.lastname: Wang
authors.forename: Shih-Han
authors.initials: SH
authors.lastname: Chang
authors.forename: Kuan-Lin
authors.initials: KL
authors.lastname: Huang
authors.forename: Yun
authors.initials: Y
authors.lastname: Chi
authors.forename: Wen-Yi
authors.initials: WY
authors.lastname: Hung
authors.forename: Chih-Ming
authors.initials: CM
authors.lastname: Chen
authors.forename: Gene-Hsiang
authors.initials: GH
authors.lastname: Lee
authors.forename: Pi-Tai
authors.initials: PT
authors.lastname: Chou