ICCAS OpenIR
Synthesis, photophysical and electrophosphorescent properties of mononuclear Pt(II) complexes with arylamine functionalized cyclometalating ligands
Qiu, Dongfang1,2; Wu, Jiang1; Xie, Zhiyuan1; Cheng, Yanxiang1; Wang, Lixiang1
2009-03-01
Source PublicationJOURNAL OF ORGANOMETALLIC CHEMISTRY
ISSN0022-328X
Volume694Issue:5Pages:737-746
AbstractFour cyclometalated Pt(II) complexes, i.e., [(L(2))PtCl] (1b), [(L(3))PtCl] (1c), [(L(2))PtC CC(6)H(5)] (2b) and [(L(3))PtC CC(6)H(5)] (2c) (HL(2) = 4-[p-(N-butyl-N-phenyl)anilino]-6-phenyl-2,2'-bipyridine and HL(3) = 4-[p(-N,N'-dibutyl-N'-phenyl)phenylene-diamino]-phenyl-6-phenyl-2,2'-bipyridine), have been synthesized and verified by (1)H NMR, (13)C NMR and X-ray crystallography. Unlike previously reported complexes [(L(1))PtCl] (1a) and [(L(1))PtC CC(6)H(5)] (2a) (HL(1) = 4,6-diphenyl-2,2'-bipyridine), intense and continuous absorption bands in the region of 300-500 nm with strong metal-to-ligand charge transfer ((1)MLCT) (d pi(Pt) -> pi*(L)) transitions (epsilon similar to 2 x 10(4) dm(3) mol (1) cm (1)) at 449-467 nm were observed in the UV-Vis absorption spectra of complexes 1b, 1c, 2b and 2c. Meanwhile, with the introduction of electron-donating arylamino groups in the ligands of 1a and 2a, complexes 1b and 2b display stronger phosphorescence in CH(2)Cl(2) solutions at room temperature with bathochromically shifted emission maxima at 595 and 600 nm, relatively higher quantum yields of 0.11 and 0.26, and much longer lifetimes of 8.4 and 4.5 mu s, respectively. An electrochromic film of 1b-based polymer was obtained on Pt or ITO electrode surface, which suggests an efficient oxidative polymerization behavior. An orange multilayer organic light-emitting diode with 1b as phosphorescent dopant was fabricated, achieving a maximum current efficiency of 11.3 cd A (1) and a maximum external efficiency of 5.7%. The luminescent properties of complexes 1c and 2c are dependent on pH value and solvent polarity, which is attributed to the protonation of arylamino units in the CNN cyclometalating ligands. (C) 2008 Elsevier B.V. All rights reserved.
KeywordNeutral-charge Platinum Arylamine Phosphorescence Organic Light-emitting Diode
DOI10.1016/j.jorganchem.2008.12.007
Indexed BySCI ; IC
Language英语
WOS IDWOS:000263365600020
PublisherELSEVIER SCIENCE SA
Citation statistics
Cited Times:29[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/68460
Collection中国科学院化学研究所
Corresponding AuthorCheng, Yanxiang
Affiliation1.Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Polymer Phys & Chem, Changchun 130022, Jilin, Peoples R China
2.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China
Recommended Citation
GB/T 7714
Qiu, Dongfang,Wu, Jiang,Xie, Zhiyuan,et al. Synthesis, photophysical and electrophosphorescent properties of mononuclear Pt(II) complexes with arylamine functionalized cyclometalating ligands[J]. JOURNAL OF ORGANOMETALLIC CHEMISTRY,2009,694(5):737-746.
APA Qiu, Dongfang,Wu, Jiang,Xie, Zhiyuan,Cheng, Yanxiang,&Wang, Lixiang.(2009).Synthesis, photophysical and electrophosphorescent properties of mononuclear Pt(II) complexes with arylamine functionalized cyclometalating ligands.JOURNAL OF ORGANOMETALLIC CHEMISTRY,694(5),737-746.
MLA Qiu, Dongfang,et al."Synthesis, photophysical and electrophosphorescent properties of mononuclear Pt(II) complexes with arylamine functionalized cyclometalating ligands".JOURNAL OF ORGANOMETALLIC CHEMISTRY 694.5(2009):737-746.
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