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Tris‐cyclometalated Iridium(III) Complexes with Three Different Ligands: a New Example with 2‐(2,4‐Difluorophenyl)pyridine‐Based Complex
Author(s) -
Lepeltier Marc,
Dumur Frédéric,
Graff Bernadette,
Xiao Pu,
Gigmes Didier,
Lalevée Jacques,
Mayer Cédric R.
Publication year - 2014
Publication title -
helvetica chimica acta
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.74
H-Index - 82
eISSN - 1522-2675
pISSN - 0018-019X
DOI - 10.1002/hlca.201300339
Subject(s) - homoleptic , iridium , tris , chemistry , time dependent density functional theory , pyridine , excited state , phosphorescence , density functional theory , photochemistry , ligand (biochemistry) , luminescence , computational chemistry , fluorescence , materials science , organic chemistry , metal , catalysis , biochemistry , physics , receptor , optoelectronics , quantum mechanics , nuclear physics
An iridium(III) complex comprising three different cyclometalated phenylpyridine‐based ligands was designed and synthesized. Interestingly, mixed‐ligand complexes could be obtained by using a simple and straightforward procedure. A tris(heteroleptic) Ir III complex was obtained as a mixture of stereoisomers that could not be separated. Photophysical properties of the tris(heteroleptic) complex was investigated by UV/VIS absorption and luminescence spectroscopy, and compared with those of the parent homoleptic complexes. Modelling by time‐dependent density functional theory (TD‐DFT) was also performed to elucidate the nature and the location of the excited state, and to support the experimental results.