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dc.contributor.authorMartínez Alonso, Marta
dc.contributor.authorCerdá, Jesús .
dc.contributor.authorMomblona, Cristina .
dc.contributor.authorPertegás, Antonio .
dc.contributor.authorJunquera Hernández, José M. .
dc.contributor.authorHeras, Aránzazu 
dc.contributor.authorRodríguez, Ana M. .
dc.contributor.authorEspino Ordóñez, Gustavo 
dc.contributor.authorBolink, Henk .
dc.contributor.authorOrtí, Enrique .
dc.date.accessioned2018-09-12T11:40:07Z
dc.date.available2018-09-12T11:40:07Z
dc.date.issued2017-09
dc.identifier.issn0020-1669
dc.identifier.urihttp://hdl.handle.net/10259/4939
dc.description.abstractA 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).en
dc.description.sponsorshipSpanish Ministry of Economy and Competitiveness (MINECO) of Spain (projects CTQ2014- 58812-C2-1-R, MAT2014-55200, CTQ2014-55583-R, CTQ2014-61914-EXP, CTQ2015-71955-REDT, CTQ2015- 70371-REDT, CTQ2015-71154-P, and Unidad de Excelencia Marıá de Maeztu MDM-2015-0538), European Feder funds (CTQ2015-71154-P), Obra Social “la Caixa” (OSLC-2012- 007), Junta de Castilla y León (BU033-U16), and Generalitat Valenciana (Prometeo2016/135)en
dc.format.mimetypeapplication/pdf
dc.language.isoenges
dc.publisherAmerican Chemical Societyen
dc.relation.ispartofInorganic Chemistry. 2017, V. 56, n. 17, p. 10298–10310
dc.subject.otherQuímica analíticaes
dc.subject.otherChemistry, Analyticen
dc.titleHighly stable and efficient light-emitting electrochemical cells based on cationic iridium complexes bearing arylazole ancillary ligandsen
dc.typeArtículoes
dc.typeinfo:eu-repo/semantics/article
dc.rights.accessRightsinfo:eu-repo/semantics/openAccess
dc.relation.publisherversionhttps://doi.org/10.1021/acs.inorgchem.7b01167
dc.identifier.doi10.1021/acs.inorgchem.7b01167
dc.relation.projectIDinfo:eu-repo/grantAgreement/MINECO/CTQ2014-58812-C2-1-R
dc.relation.projectIDinfo:eu-repo/grantAgreement/MINECO/MAT2014-55200
dc.relation.projectIDinfo:eu-repo/grantAgreement/MINECO/CTQ2014-55583-R
dc.relation.projectIDinfo:eu-repo/grantAgreement/MINECO/CTQ2014-61914-EXP
dc.relation.projectIDinfo:eu-repo/grantAgreement/MINECO/CTQ2015-71955-REDT
dc.relation.projectIDinfo:eu-repo/grantAgreement/MINECO/CTQ2015- 70371-REDT
dc.relation.projectIDinfo:eu-repo/grantAgreement/MINECO/CTQ2015-71154-P
dc.relation.projectIDinfo:eu-repo/grantAgreement/MICINN/MDM-2015-0538
dc.relation.projectIDinfo:eu-repo/grantAgreement/FEDER/CTQ2015-71154-P
dc.relation.projectIDinfo:eu-repo/grantAgreement/FundaciónLaCaixa/OSLC-2012-007
dc.relation.projectIDinfo:eu-repo/grantAgreement/JCyL/BU033-U16
dc.relation.projectIDinfo:eu-repo/grantAgreement/GVA/Prometeo2016-135
dc.type.hasVersioninfo:eu-repo/semantics/acceptedVersionen


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