Synthesis and characterization of phosphorescent cyclometalated iridium complexes containing 2,5-diphenylpyridine based ligands

	Synthesis and characterization of phosphorescent cyclometalated iridium complexes containing 2,5-diphenylpyridine based ligands
其他题名	论文其他题名
	Xu M. L.; Li W. L.; An Z. W.; Zhou Q.; Wang G. Y.
	2005
发表期刊	Applied Organometallic Chemistry
ISSN	0268-2605
卷号	19 期号:12 页码:1225-1231
摘要	A series of phosphorescent cyclometalated iridium complexes with 2,5-diphenylpyridine-based ligands has been synthesized and characterized to investigate the effect of the simple ligand modification on photophysics, thermostability and electrochemistry. The complexes have the general structure (C<^>N)(2)Ir(acac), where C<^>N is a monoanionic cyclometalating ligand [e.g. 2,5-diphenylpyridyl (dppy), 2,5-di(4-methoxyphenyl)pyridyl (dmoppy), 2,5-di(4-ethoxyphenyl)pyridyl (deoppy) and 2,5di(4-ethylphenyl)pyridyl (deppy)]. The absorption, emission, cyclic voltammetry and thermostability of the complexes were systematically investigated. The (dppy)(2)Ir(acac) has been characterized using X-ray crystallography. Calculation on the electronic ground state of (dPPY)(2)Ir(acac) was carried out using B3LYP density functional theory. The highest occupied molecular orbital (HOMO) level is a mixture of Ir and ligand orbitals, while the lowest occupied molecular orbital (LUMO) is predominantly dppy ligand-based. Electrochemical studies showed the oxidation potentials of (dmoppy)(2)Ir(acac), deoppy)(2)Ir(acac), (deppy)(2)Ir(acac) were smaller than that of (ppy)(2)Ir(acac), while the oxidation potential of (dppy)(2)Ir(acac) was larger relative to (ppy)(2)Ir(acac). The 10% weight reduction temperatures of these complexes were above that of (ppy)(2)Ir(acac). All complexes exhibited intense green photoluminescence, which has been attributed to MLCT triplet emission. The maximum emission wavelengths in CH2Cl2 at room temperature were in the range 531-544 nm, which is more red-shifted than that of (ppy)(2)Ir(acac). Copyright (c) 2005 John Wiley & Sons, Ltd.
收录类别	SCI ; EI
语种	英语
文献类型	期刊论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/26820
专题	中科院长春光机所知识产出
推荐引用方式 GB/T 7714	Xu M. L.,Li W. L.,An Z. W.,et al. Synthesis and characterization of phosphorescent cyclometalated iridium complexes containing 2,5-diphenylpyridine based ligands[J]. Applied Organometallic Chemistry,2005,19(12):1225-1231.
APA	Xu M. L.,Li W. L.,An Z. W.,Zhou Q.,&Wang G. Y..(2005).Synthesis and characterization of phosphorescent cyclometalated iridium complexes containing 2,5-diphenylpyridine based ligands.Applied Organometallic Chemistry,19(12),1225-1231.
MLA	Xu M. L.,et al."Synthesis and characterization of phosphorescent cyclometalated iridium complexes containing 2,5-diphenylpyridine based ligands".Applied Organometallic Chemistry 19.12(2005):1225-1231.

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