Artículo
Two-photon absorption properties and 1 O 2 generation ability of Ir complexes: an unexpected large cross section of [Ir(CO) 2 Cl(4-(para-di-n-butylaminostyryl)pyridine)]
Colombo, Alessia; Dragonetti, Claudia; Roberto, Dominique; Valore, Adriana; Ferrante, Camilla; Fortunati, Ilaria; Picone, Andrea Lorena
; Todescato, Francesco; Williams, J. A. Gareth
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Fecha de publicación:
07/2015
Editorial:
Royal Society of Chemistry
Revista:
Dalton Transactions
ISSN:
1477-9226
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
The new complexes cis-[Ir(CO)2Cl(4-(para-di-n-butylaminostyryl)pyridine)] (1) and [Ir(cyclometallated-2-phenylpyridine)2(4,4′-(para-di-n-butylaminostyryl)-2,2′-bipyridine)][PF6] (3) were synthesized and fully characterized along with the known complex Ir(cyclometallated-2-phenylpyridine)2(5-Me-1,10-phenanthroline)][PF6] (2). Remarkably, complex 1, with an Ir(I) centre, displays fluorescence – as opposed to the phosphorescence typical of many Ir(III) complexes – with a modestly high quantum yield in solution, opening a new route for the design of iridium-based emitters which should not be limited to the +3 oxidation state. It is also characterized by an unexpectedly large two-photon absorption (TPA) cross section, an order of magnitude higher than that previously reported for Ir(III) or Pt(II) complexes. The great potential of cyclometallated Ir(III) complexes for photodynamic therapy was confirmed, with 2 and 3 showing a good singlet oxygen generation ability, coupled with a modest TPA activity for 2.
Palabras clave:
Iridium Complexes
,
Two Photon Absorption
,
Singlet Oxygen Generation
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Articulos(CEQUINOR)
Articulos de CENTRO DE QUIMICA INORGANICA "DR. PEDRO J. AYMONINO"
Articulos de CENTRO DE QUIMICA INORGANICA "DR. PEDRO J. AYMONINO"
Citación
Colombo, Alessia; Dragonetti, Claudia; Roberto, Dominique; Valore, Adriana; Ferrante, Camilla; et al.; Two-photon absorption properties and 1 O 2 generation ability of Ir complexes: an unexpected large cross section of [Ir(CO) 2 Cl(4-(para-di-n-butylaminostyryl)pyridine)]; Royal Society of Chemistry; Dalton Transactions; 44; 35; 7-2015; 15712-15720
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