標題: | Pt(II) Complexes with 6-(5-Trifluoromethyl-Pyrazol-3-yl)-2,2 '-Bipyridine Terdentate Chelating Ligands: Synthesis, Characterization, and Luminescent Properties |
作者: | Chen, Jing-Lin Chang, Sheng-Yuan Chi, Yun Chen, Kellen Cheng, Yi-Ming Lin, Chun-Wei Lee, Gene-Hsiang Chou, Pi-Tai Wu, Chen-Hao Shih, Ping-I Shu, Ching-Fong 應用化學系 Department of Applied Chemistry |
公開日期: | 1-Jan-2008 |
摘要: | A series of Pt(II) complexes Pt(fpbpy)Cl (1), Pt(fpbpy)(OAc) (2), Pt(fpbpy)(NHCOMe) (3), Pt(fpbpy)(NHCOEt) (4), and [Pt(fpbpy)(NCMe)](BF(4)) (5) with deprotonated 6-(5-trifluoromethyl-pyrazol-3-yl)-2,2'-bipyridine terdentate ligand are prepared, among which 1 is converted to complexes 2-5 by a simple ligand substitution. Alternatively, acetamide complex 3 is prepared by hydrolysis of acetonitrile complex 5, while the back conversion from 3 to 1 is regulated by the addition of HCl solution, showing the reaction sequence 1 -> 5 -> 3 -> 1. Mullilayer OLED devices are successfully fabricated by using triphenyl-(4-(9-phenyl-9H-fluoren-9-yl)phenyl) silane (TPSi-F) as host material and with doping concentrations of 1 varying from 7 to 100%. The electroluminescence showed a substantial red-shifting versus the normal photoluminescence detected in solution. Moreover, at a doping concentration of 28%, the device showed a saturated red luminescence with a maximum external quantum yield of 8.5% at 20 mA cm(-2) and a peak luminescence of 47543 cd m(-2) at 18.5 V. |
URI: | http://dx.doi.org/10.1002/asia.200800211 http://hdl.handle.net/11536/9857 |
ISSN: | 1861-4728 |
DOI: | 10.1002/asia.200800211 |
期刊: | CHEMISTRY-AN ASIAN JOURNAL |
Volume: | 3 |
Issue: | 12 |
起始頁: | 2112 |
結束頁: | 2123 |
Appears in Collections: | Articles |