Synthesis and Electrochemical Study of the Ir(III) Complexes Containing the Diphenyl-quinoline, -Quinoxaline and Pyrazolonate Ligands
- Authors
- Lee, Hyun-Shin; Ha, Yunkyoung
- Issue Date
- 20-Mar-2011
- Publisher
- WILEY-V C H VERLAG GMBH
- Keywords
- Iridium complex; Pyrazolonate (prz-R); dpq/dpqx ligands; Red phosphorescence; Electrochemical properties
- Citation
- BULLETIN OF THE KOREAN CHEMICAL SOCIETY, v.32, no.3, pp.1007 - 1010
- Journal Title
- BULLETIN OF THE KOREAN CHEMICAL SOCIETY
- Volume
- 32
- Number
- 3
- Start Page
- 1007
- End Page
- 1010
- URI
- https://scholarworks.bwise.kr/hongik/handle/2020.sw.hongik/19917
- DOI
- 10.5012/bkcs.2011.32.3.1007
- ISSN
- 0253-2964
- Abstract
- Ir(dpq/dpqx),(przl-R) complexes were prepared and their electrochemical properties were investigated, where dpq, dpqx and przl-R represent 2,3-diphenylquinoline, 2,3-diphenylquinoxaline and N-phenyl-R-pyrazolonate derivatives, respectively. The iridium complexes containing dpq and dpqx as main ligands were reported to show red phosphorescence, and involvement of a pyrazolonate ancillary ligand in the iridium complexes led to high luminous efficiency for organic light-emitting diodes. In this study, we synthesized red phosphorescent iridium complexes containing a new pyrazolonate ancillary ligand and investigated the HOMOs, LUMOs and resulting electrochemical gaps of Ir(dpq/dpqx)(2)(przl-R) by cyclic voltammetry. The emission wavelengths of the complexes at 600 - 640 nm were consistent with the gaps of 1.95 - 2.03 eV measured from reduction and oxidation potentials of the complexes.
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