RT Journal Article
T1 Iridium(III) emitters based on 1,4-disubstituted-1H-1,2,3-triazoles as cyclometalating ligand: synthesis, characterization, and electroluminescent devices
A1 Fernández-Hernández, Jesús M.
A1 Beltrán Fínez, Juan Ignacio
A1 Lemaur, Vicent
A1 Gálvez-López, María-Dolores
A1 Chien, Chen-Han
A1 Polo, Federico
A1 Orselli, Enrico
A1 Fröhlich, Roland
A1 Cornil, Jérôme
A1 De Cola, Luisa
AB A series of blue and blue-green emitters based on neutral bis- and tris-cyclometalated Ir(III) complexes with 1-benzyl-4-(2,6-difluorophenyl)-1H-1,2,3-triazole (dfptrBn) as cyclometalating ligand is reported. The bis-cyclometalated complexes of the type [Ir(dfptrBn)(2)((LX)-X-boolean AND)] with different ancillary ligands, (LX)-X-boolean AND = picolinate (pic) (2) or 2-(5-(perfluorophenyl)-2H-1,2,4-triazol-3-yl)pyridine (pytrF(5)) (3), are described and their photophysical properties compared with the analogous complexes containing the archetypal 2-(2,4-difluorophenyl)-pyridinato (dfppy) as cyclometaled ligand ((CN)-N-boolean AND). Complex 2 exhibits a marked solvatochromic behavior, from 475 nm in toluene to 534 nm in formamide, due to the strong MLCT character of its emissive excited state. Complex 3 displays a true-blue emission, narrower in the visible part than FIrpic. In addition, the homoleptic complex [Ir(dfprBn)(3)] (4) and the heteroleptic compounds with mixed arylpyridine/aryltriazole ligands, [Ir(dfptrBn)(2)((CN)-N-boolean AND)] ((CN)-N-boolean AND = 2-phenylpyridinato (ppy) (5) or dfppy (6)), have been synthesized and fully characterized. The facial (fac) complex fac-4 is emissive at 77 K showing a deep-blue emission, but it is not luminescent in solution at room temperature similarly to their phenylpyrazole counterparts. However, the fac isomers, fac-5 and fac-6, are highly emissive in solution and thin films, reaching emission quantum yields of 76%, with emission colors in the blue to blue-green region. The photophysical properties for all complexes have been rationalized by means of quantum-chemical calculations. In addition, we constructed electroluminescent devices, organic light-emitting diodes (OLEDs) by sublimation of fac-6, and by solution processed polymer-based devices (PLEDs) using complexes fac-5 or fac-6 as dopants.
PB American Chemical Society
SN 0020-1669
YR 2013
FD 2013
LK https://hdl.handle.net/20.500.14352/97645
UL https://hdl.handle.net/20.500.14352/97645
LA eng
NO Fernandez-Hernandez, J. M., Beltran, J. I., Lemaur, V., Galvez-Lopez, M. D., Chien, C. H., Polo, F., ... & De Cola, L. (2013). Iridium (III) Emitters Based on 1, 4-Disubstituted-1 H-1, 2, 3-triazoles as Cyclometalating Ligand: Synthesis, Characterization, and Electroluminescent Devices. Inorganic Chemistry, 52(4), 1812-1824.
NO Esta depositada la versión del artículo enviada a la revista
NO Fundación Séneca
NO Instituto de Salud Carlos III
NO Ministry of Science and Technology, Taiwan
NO Deutscher Akademischer Austausch Dienst 
NO Fonds de la Recherche Scientifique (France)
NO Ministerio de Ciencia e Innovación (España)
DS Docta Complutense
RD 15 dic 2025