Phosphorescent Iridium(III) Complexes with a Dianionic C, C', N, N'-Tetradentate Ligand

To prepare new phosphorescent iridium(III) emitters, 2-phenyl-6-(1-phenyl-1-(pyridin-2-yl)ethyl)pyridine (H2L) has been designed and its reactions with [Ir(μ-Cl)(η4-COD)]2 (1, COD = 1,5-cyclooctadiene) have been studied. The products obtained depend on the refluxing temperature of the solvent. Thus,...

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Detalles Bibliográficos
Autores: Benavent, L., Boudreault, P.L.T., Esteruelas, M.A., López, A.M., Oñate, E., Tsai, J.Y.
Tipo de recurso: artículo
Estado:Versión aceptada para publicación
Fecha de publicación:2020
País:España
Institución:Universidad de Zaragoza
Repositorio:Zaguán. Repositorio Digital de la Universidad de Zaragoza
OAI Identifier:oai:zaguan.unizar.es:106749
Acceso en línea:http://zaguan.unizar.es/record/106749
Access Level:acceso abierto
Descripción
Sumario:To prepare new phosphorescent iridium(III) emitters, 2-phenyl-6-(1-phenyl-1-(pyridin-2-yl)ethyl)pyridine (H2L) has been designed and its reactions with [Ir(μ-Cl)(η4-COD)]2 (1, COD = 1,5-cyclooctadiene) have been studied. The products obtained depend on the refluxing temperature of the solvent. Thus, complexes Ir(κ4-C,C′,N,N′-L)Cl(CO) (2), [Ir(η4-COD)(κ2-N,N′-H2L)][IrCl2(η4-COD)] (3), and [Ir(μ-Cl)(κ4-C,C′,N,N′-L)]2 (4) have been formed in 2-ethoxyethanol, propan-2-ol, and 1-phenylethanol, respectively. Complex 4 reacts with K(acac) to give the acetylacetonate derivative Ir(κ4-C,C′,N,N′-L)(acac) (5). Complexes 2 and 5 are efficient blue-green and green emitters of classes [6tt+1m+2m] and [6tt+3b], respectively. They display lifetimes in the range of 1.1–4.5 μs and high quantum yields (0.54–0.87) in both PMMA films and 2-MeTHF at room temperature.

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