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Citation: LV Jianhong, MA Zhihua, DING Junqiao, WANG Lixiang. Synthesis and Characterization of a Green-Emitting Iridium Complex Based on Fluorinated Benzoimidazole Ligand[J]. Chinese Journal of Applied Chemistry, ;2014, 31(10): 1177-1184. doi: 10.3724/SP.J.1095.2014.40050 shu

Synthesis and Characterization of a Green-Emitting Iridium Complex Based on Fluorinated Benzoimidazole Ligand

LV Jianhong ^a,b ,
MA Zhihua ^a ,
DING Junqiao ^a,, ,
WANG Lixiang ^a,,

1.
a State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China;
2.
b University of Chinese Academy of Sciences, Beijing 100049, China

Corresponding author: DING Junqiao, WANG Lixiang,
Received Date: 24 February 2014
Available Online: 18 April 2014
Fund Project: 国家重点基础研究发展计划(973计划)(2009CB623601) (973计划)(2009CB623601)国家自然科学基金资助项目(21174144,21204084,51322308和91333205) (21174144,21204084,51322308和91333205)

On the basis of a fluorinated ligand, namely 2-(4'-fluorophenyl)-1-phenyl-benzoimidazole, a green-emitting iridium complex mer-Ir(FPBI)₃ with meridional configuration has been successfully synthesized under a temperature higher than 200℃, which is confirmed by both ¹H NMR and single crystal X-ray diffraction analysis. Different from previously-reported meridional iridium complexes(< 0.1), noticeably, mer-Ir(FPBI)₃ shows a photoluminescent quantum yield as high as 0.46. Therefore, highly efficient phosphorescent organic light-emitting diodes(PhOLEDs) are realized by tuning the doping concentration of mer-Ir(FPBI)₃ into 4, 4'-N, N'-dicarbazolebiphenyl(CBP), revealing a maximum current efficiency of 38.5 cd/A(11.8%) with the corresponding Commission Internationale de L'Eclairage(CIE) coordinates of(0.29, 0.58).
- meridional configuration,
- iridium complex,
- photoluminescent quantum yield,
- phosphorescent organic light-emitting diodes
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