Dual Luminescence, Interligand Decay, and Nonradiative Electronic Relaxation of Cyclometalated Iridium Complexes in Solution

Femtosecond broadband photoluminescence studies are presented for Ir­(ppy)3 (Ir1), Ir­(ppy)2(pic) (Ir2), Ir­(ppy)2(bpy)­(PF6) (Ir3), Ir­(ppz)3 (Ir4), and Ir­(ppz)2dipy (Ir5) (where ppy = 2-phenylpyridine, pic = picolinate, bpy = 2,2′-bipyridine, ppz = 1-phenylpyrazole, and dipy = 5-phenyldipyrrinato...

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Bibliographic Details
Published in:Journal of physical chemistry. C 2016-08, Vol.120 (30), p.16459-16469
Main Authors: Pomarico, E., Silatani, M., Messina, F., Braem, O., Cannizzo, A., Barranoff, E., Klein, J. H., Lambert, C., Chergui, M.
Format: Article
Language:English
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Summary:Femtosecond broadband photoluminescence studies are presented for Ir­(ppy)3 (Ir1), Ir­(ppy)2(pic) (Ir2), Ir­(ppy)2(bpy)­(PF6) (Ir3), Ir­(ppz)3 (Ir4), and Ir­(ppz)2dipy (Ir5) (where ppy = 2-phenylpyridine, pic = picolinate, bpy = 2,2′-bipyridine, ppz = 1-phenylpyrazole, and dipy = 5-phenyldipyrrinato) in solution. Upon 400-nm excitation of Ir1–Ir3, we observed a prompt population of the lowest MLCT states. The higher states decay on an ultrafast time scale (
ISSN:1932-7447
1932-7455
DOI:10.1021/acs.jpcc.6b04896