Phosphorescent Ir(iii) complexes with both cyclometalate chromophores and phosphine-silanolate ancillary: concurrent conversion of organosilane to silanolate
作者:Fushi Zhang、Liduo Wang、Shih-Han Chang、Kuan-Lin Huang、Yun Chi、Wen-Yi Hung、Chih-Ming Chen、Gene-Hsiang Lee、Pi-Tai Chou
DOI:10.1039/c3dt32408g
日期:——
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 ηext of 10.1% and a brightness of 45 900 cd m−2 at 700 mA cm−2 (14.5 V) with ηext of 10.2%, respectively.
通式为[(C^N)2Ir(P^SiO)]的Ir(III)金属配合物,其中(C^N)H为2-苯基异喹啉(1)、2-苯基吡啶(2)或2-(2,4-二氟苯基)吡啶(3)、以及 (P^SiO)H 是二苯基硅烷(a)或二甲基硅烷(b)取代基的有机硅烷醇辅助螯合物。这些复合物在室温下的溶液中显示出 489-632 纳米区域的明亮磷光,首次成功地将有机硅烷醇用作辅助螯合物。在应用方面,使用掺入 N,N′-二咔唑基-3,5-苯(mCP)的荧光粉 3a 和 3b 的有机发光二极管(OLED)在 800 mA cm-2 (12 V) 时的最大亮度为 50 800 cd m-2,ηext 为 10.1%;在 700 mA cm-2 (14.5 V) 时的最大亮度为 45 900 cd m-2,ηext 为 10.2%。