2026-06-21T16:01:30Zhttps://riubu.ubu.es/oai/requestoai:riubu.ubu.es:10259/49392021-11-10T09:38:18Zcom_10259_3844com_10259_5086com_10259_2604col_10259_3845
Repositorio Institucional de la Universidad de Burgos
author
Martínez Alonso, Marta
author
Cerdá, Jesús .
author
Momblona, Cristina .
author
Pertegás, Antonio .
author
Junquera Hernández, José M. .
author
Heras, Aránzazu
author
Rodríguez, Ana M. .
author
Espino Ordóñez, Gustavo
author
Bolink, Henk .
author
Ortí, Enrique .
2018-09-12T11:40:07Z
2018-09-12T11:40:07Z
2017-09
0020-1669
http://hdl.handle.net/10259/4939
10.1021/acs.inorgchem.7b01167
A series of bis-cyclometalated iridium(III)
complexes of general formula [Ir(ppy)2(N∧N)][PF6] (ppy−
= 2-phenylpyridinate; N∧N = 2-(1H-imidazol-2-yl)pyridine
(1), 2-(2-pyridyl)benzimidazole (2), 1-methyl-2-pyridin-2-yl-
1H-benzimidazole (3), 2-(4′-thiazolyl)benzimidazole (4), 1-
methyl-2-(4′-thiazolyl)benzimidazole (5)) is reported, and
their use as electroluminescent materials in light-emitting
electrochemical cell (LEC) devices is investigated. [2][PF6]
and [3][PF6] are orange emitters with intense unstructured
emission around 590 nm in acetonitrile solution. [1][PF6],
[4][PF6], and [5][PF6] are green weak emitters with
structured emission bands peaking around 500 nm. The
different photophysical properties are due to the effect that the
chemical structure of the ancillary ligand has on the nature of the emitting triplet state. Whereas the benzimidazole unit stabilizes
the LUMO and gives rise to a 3MLCT/3LLCT emitting triplet in [2][PF6] and [3][PF6], the presence of the thiazolyl ring
produces the opposite effect in [4][PF6] and [5][PF6] and the emitting state has a predominant 3LC character. Complexes with
3MLCT/3LLCT emitting triplets give rise to LEC devices with luminance values 1 order higher than those of complexes with
3LC emitting states. Protecting the imidazole N−H bond with a methyl group, as in complexes [3][PF6] and [5][PF6], shows
that the emissive properties become more stable. [3][PF6] leads to outstanding LECs with simultaneously high luminance (904
cd m−2), efficiency (9.15 cd A−1), and stability (lifetime over 2500 h).
eng
Highly stable and efficient light-emitting electrochemical cells based on cationic iridium complexes bearing arylazole ancillary ligands
info:eu-repo/semantics/article
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
URL
https://riubu.ubu.es/bitstream/10259/4939/1/InorgChem2017_.pdf
File
MD5
1185ab165a169b97d75f8c519e90e103
964958
application/pdf
InorgChem2017_.pdf
URL
https://riubu.ubu.es/bitstream/10259/4939/3/InorgChem2017_.pdf.txt
File
MD5
33fb9c7fc48a782ae1c87e625c92f011
78170
text/plain
InorgChem2017_.pdf.txt