Synthesis and electroluminescent property of novel europium complexes with oxadiazole substituted 1,10-phenanthroline and 2,2 '-bipyridine ligands

doi:10.1039/b9nj00461k

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	Synthesis and electroluminescent property of novel europium complexes with oxadiazole substituted 1,10-phenanthroline and 2,2 '-bipyridine ligands
	Chen, Zhuqi; Ding, Fei; Hao, Feng; Guan, Ming; Bian, Zuqiang; Ding, Bei; Huang, Chunhui
刊名	NEW JOURNAL OF CHEMISTRY
	2010
卷号	34 期号:3 页码:487-494
ISSN号	1144-0546
DOI	10.1039/b9nj00461k
英文摘要	Several 1,10-phenanthroline derivatives (PhoR), 2,2 '-bipyridine derivatives (BpoR) and related europium complexes Eu(TTA)(3)PhoR and Eu(TTA)(3)BpoR were synthesized (HTTA = 2-thenoyltrifluoroacetone). Single crystal X-ray diffraction of Eu(TTA)(3)Php (Php = 2-(pyridyl)-1,10-phenanthroline) shows that Php acts as a tridentate N(boolean AND)N(boolean AND)N ligand, leading to a high stability of the complex for vacuum evaporation. When an oxadiazole moiety is incorporated into the ligand, the corresponding europium complexes show improved carrier-transporting abilities as well as thermal stabilities under vapor deposition for electroluminescence (EL) applications. Experiments revealed that these complexes have high photoluminescence (PL) quantum yields due to suitable triplet energy levels (ET) of the ligands, between 19 724 and 22 472 cm(-1), for the sensitization of Eu(III) ((5)D(0): 17 500 cm(-1)). Utilizing Eu(TTA)(3)PhoB (PhoB = 2-(5-phenyl-1,3,4-oxadiazol-2-yl)-1,10-phenanthroline) as the dopant emitter in CBP (4,4 '-N,N '-dicarbazolebiphenyl), EL devices with a structure of TPD (4,4 '-bis[N-(p-tolyl)-N-phenylamino] biphenyl, 30 nm)/Eu(TTA)(3)PhoB: CBP (7.5%, 20nm)/BCP (2,9-dimethyl-4,7-diphenyl-1,10-phenanthroline, 20 nm)/Alq3 (tris(8-hydroxyquinoline), 30 nm) exhibited a pure emission from europium ions. The highest efficiency obtained was 5.5 lm W(-1), 8.7 cd A(-1) and the maximum brightness achieved was 1086 cd m(-2). At a practical brightness of 100 cd m(-2), the e. ciency remains above 2.0 cd A(-1).
语种	英语
出版者	ROYAL SOC CHEMISTRY
WOS记录号	WOS:000275382100018
内容类型	期刊论文
源URL	[http://ir.iccas.ac.cn/handle/121111/69563]
专题	中国科学院化学研究所
通讯作者	Bian, Zuqiang
作者单位	Peking Univ, Beijing Natl Lab Mol Sci, Coll Chem & Mol Engn, State Key Lab Rare Earth Mat Chem & Applicat, Beijing 100871, Peoples R China
推荐引用方式 GB/T 7714	Chen, Zhuqi,Ding, Fei,Hao, Feng,et al. Synthesis and electroluminescent property of novel europium complexes with oxadiazole substituted 1,10-phenanthroline and 2,2 '-bipyridine ligands[J]. NEW JOURNAL OF CHEMISTRY,2010,34(3):487-494.
APA	Chen, Zhuqi.,Ding, Fei.,Hao, Feng.,Guan, Ming.,Bian, Zuqiang.,...&Huang, Chunhui.(2010).Synthesis and electroluminescent property of novel europium complexes with oxadiazole substituted 1,10-phenanthroline and 2,2 '-bipyridine ligands.NEW JOURNAL OF CHEMISTRY,34(3),487-494.
MLA	Chen, Zhuqi,et al."Synthesis and electroluminescent property of novel europium complexes with oxadiazole substituted 1,10-phenanthroline and 2,2 '-bipyridine ligands".NEW JOURNAL OF CHEMISTRY 34.3(2010):487-494.