Dyes and Pigments p. 60 - 68 (2016)
Update date:2022-08-10
Topics:
Sarada, Ganguri
Sim, Bomi
Cho, Woosum
Yoon, Juho
Gal, Yeong-Soon
Kim, Jang-Joo
Jin, Sung-Ho
Two Ir(III) complexes containing the chromophoric ancillary ligands 2-(4,5-dihydrooxazol-2-yl)phenol and 2-(1-ethyl-4,5-dihydro-1H-imidazol-2-yl)phenol, and a highly functionalized phenylpyridine derivative, 3-(4-(tert-butyl)pyridin-2-yl)-2,6-difluorobenzonitrile, as a cyclometalating ligand were designed and synthesized. The oxazoline/imidazoline heterocycle of the ancillary ligand has the effect of enhancing the metal to ligand charge transfer transition nature of the emitting excited state and the fluorine and cyano substituents on the ligand have enriched the intersystem crossings, as indicated by the experimental photoluminescence analysis. As a result, the oxazoline and imidazoline containing complexes exhibited high photoluminescence quantum yields of about >90% with bright sky-blue emission at 480 nm and bluish-green light at 495 nm, respectively, along with excellent thermal/morphological stability about 400 °C and good solubility, that make them suitable for both wet- and dry-processes. In particular, the phosphorescent OLEDs fabricated by a dry-process showed the maximum EQEs of 21.9% and 19.7% for the oxazoline and imidazoline containing complexes, respectively.
View MoreVanderArk International Limited
Contact:86-10-82437576
Address:Qing He
zhuzhou zhongle chemical co. ltd.
Contact:+86-0731 28228409
Address:Zhuzhou, Hunan, China
Shouguang Haogang Chemical Co., Ltd.
Contact:86-0536-5672678
Address:Bohai Chemical Industrial Park,
Zhengzhou Minzhong Pharmaceutical Co.,ltd
Contact:0086-371-65797115
Address:15/F,Jiangshan Bldg, NO.126 Huanghe Road,Zhengzhou, China
Rugao Jinling Chemical Co., Ltd.
Contact:0086-513-68005586
Address:Lianluo new village huangshi town Rugao city Jiangsu Province.
Doi:10.1007/s11164-018-03714-y
(2019)Doi:10.1246/bcsj.54.2057
(1981)Doi:10.1039/d1tc02577e
(2021)Doi:10.1016/j.jcat.2021.03.024
(2021)Doi:10.1007/s11164-017-2919-2
(2017)Doi:10.1016/j.tetlet.2007.07.120
(2007)