ICCAS OpenIR
Photophysical properties of heteroleptic iridium complexes containing carbazole-functionalized beta-diketonates
Liu, Zhiwei; Nie, Daobo; Bian, Zuqiang; Chen, Fangfang; Lou, Bin; Bian, Jiang; Huang, Chunhui
2008-03-14
Source PublicationCHEMPHYSCHEM
ISSN1439-4235
Volume9Issue:4Pages:634-640
AbstractTwelve iridium complexes with general formula of Ir((CN)-N-Lambda)(2)(LX) [(CN)-N-Lambda represents the cyclometalated ligand, i.e. 2-(2,4-difluorophenyl) pyridine (dtppy), 2-phenylpyridine (ppy), dibenzo{f, h}quinoxaline (DBQ); LX stands for beta-diketonate, i.e. acetyl acetonate (acac), 1-(carbazol-9-yl)-5,5-dimethylhexane-2,4-diketonate (CBDK), 1-(carbazol-9-yl)-5,5,6,6,7,7,7-heptafluoroheptane-2,4-diketonate (CHFDK), 1-(N-ethyl-carbazol-3-yl)-4,4,5,5,6,6,6-heptafluorohexane-1,3-diketonate (ECHFDK)l are synthesized, characterized and their photophysical properties are systemically studied. In addition, crystals of Ir(DBQ)(2)(CHFDK) and Ir(DBQ)(2)(acac) are obtained and characterized by single crystal X-ray diffraction. The choice of these iridium complexes provides an opportunity for tracing the effect of the triplet energy level of ancillary ligands on the photophysical and electrochemical behaviors. Data show that if the triplet energy level of the beta-diketonate is higher than that of the Ir((CN)-N-Lambda)(2) fragment and there is no superposition on the state density map, strong (LC)-L-3 or (MLCT)-M-3-based phosphorescence can be obtained. Alternatively, if the state density map of the two parts are in superposition, the (LC)-L-3 or (MLCT)-M-3-based transition will be quenched at room temperature. Density functional theory calculations show that these complexes can be divided into two categories. The lowest excited state is mainly determined by (CN)-N-Lambda but not beta-diketonate when the difference between the triplet energy levels of the two parts is large. However when this difference is very small, the lowest excited state will be determined by both sides. This provides a satisfactory explanation for the experimental observations.
KeywordElectrochemistry Charge Transfer Density Functional Calculations Iridium Photochemistry
DOI10.1002/cphc.200700648
Indexed BySCI
Language英语
WOS IDWOS:000254461300017
PublisherWILEY-V C H VERLAG GMBH
Citation statistics
Cited Times:23[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/63868
Collection中国科学院化学研究所
Corresponding AuthorBian, Zuqiang
AffiliationBeijing Univ, Coll Chem & Mol Engn, State Key Lab Rare Earth Mat, BNLMS, Beijing 100871, Peoples R China
Recommended Citation
GB/T 7714
Liu, Zhiwei,Nie, Daobo,Bian, Zuqiang,et al. Photophysical properties of heteroleptic iridium complexes containing carbazole-functionalized beta-diketonates[J]. CHEMPHYSCHEM,2008,9(4):634-640.
APA Liu, Zhiwei.,Nie, Daobo.,Bian, Zuqiang.,Chen, Fangfang.,Lou, Bin.,...&Huang, Chunhui.(2008).Photophysical properties of heteroleptic iridium complexes containing carbazole-functionalized beta-diketonates.CHEMPHYSCHEM,9(4),634-640.
MLA Liu, Zhiwei,et al."Photophysical properties of heteroleptic iridium complexes containing carbazole-functionalized beta-diketonates".CHEMPHYSCHEM 9.4(2008):634-640.
Files in This Item:
There are no files associated with this item.
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Liu, Zhiwei]'s Articles
[Nie, Daobo]'s Articles
[Bian, Zuqiang]'s Articles
Baidu academic
Similar articles in Baidu academic
[Liu, Zhiwei]'s Articles
[Nie, Daobo]'s Articles
[Bian, Zuqiang]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Liu, Zhiwei]'s Articles
[Nie, Daobo]'s Articles
[Bian, Zuqiang]'s Articles
Terms of Use
No data!
Social Bookmark/Share
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.