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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/3377
Title: Synthesis, structure and electroluminescent properties of cyclometalated iridium complexes possessing sterically hindered ligands
Authors: Velusamy M.
Justin Thomas, K. R.
Chen C.-H.
Lin J.T.
Wen Y.S.
Hsieh W.-T.
Lai C.-H.
Chou P.-T.
Published in: Dalton Transactions
Abstract: New CN donor ligands incorporating pyridine or benzoimidazole N donors and a sterically hindered cyclometalating aromatic core featuring a polyphenylenephenyl, fluoranthene, or triphenylene segment are prepared and successfully converted into heteroleptic iridium(iii) cyclometalated complexes with acetylacetone auxiliary ligands. The X-ray structure of the complex, derived from a ligand containing a fluoranthene fragment, has been solved to unveil the corresponding structure. The results clearly demonstrate that the nature of the σ-coordinating ligand segment plays a key role in dictating the emission profile and peak position, such that the emission hue has been successfully tuned ranging from green to red. Supplementary support of this viewpoint is also rendered by computational (DFT) approaches. Electroluminescent devices fabricated using a complex as dopant in the PVK matrix were found to exhibit bright greenish yellow emission with promising device characteristics (maximum brightness 26450 cd m-2 at 30 V and a maximum current efficiency of 40 cd A-1). © The Royal Society of Chemistry.
Citation: Dalton Transactions (2007), (28): 3025-3034
URI: https://doi.org/10.1039/b618311e
http://repository.iitr.ac.in/handle/123456789/3377
Issue Date: 2007
Publisher: Royal Society of Chemistry
ISSN: 14779226
Author Scopus IDs: 6603305200
57203389297
36463151900
7501725859
7401777082
15062898100
57154922000
7201966354
Author Affiliations: Velusamy, M., Institute of Chemistry, Academia Sinica, 115 Nankang, Taipei, Taiwan
Thomas, K.R.J., Institute of Chemistry, Academia Sinica, 115 Nankang, Taipei, Taiwan
Chen, C.-H., Institute of Chemistry, Academia Sinica, 115 Nankang, Taipei, Taiwan
Lin, J.T., Institute of Chemistry, Academia Sinica, 115 Nankang, Taipei, Taiwan
Wen, Y.S., Institute of Chemistry, Academia Sinica, 115 Nankang, Taipei, Taiwan
Hsieh, W.-T., Department of Chemistry, National Taiwan University, Taipei, Taiwan
Lai, C.-H., Department of Chemistry, National Taiwan University, Taipei, Taiwan
Chou, P.-T., Department of Chemistry, National Taiwan University, Taipei, Taiwan
Corresponding Author: Lin, J.T.; Institute of Chemistry, Academia Sinica, 115 Nankang, Taipei, Taiwan; email: jtlin@chem.sinica.edu.tw
Appears in Collections:Journal Publications [CY]

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