Luminescent bis-cyclometallated iridium(III) complexes containing phosphine-based ligands: Influence of the P^N bridge

Aranda, Braulio; Aguirre , Pedro; Moya, Sergio A.; Bonneau, Michaele; Gareth Williams J.A.; Toupet, Loic; Escadeillas,Muriel; Le Bozec , Hubert; Guerchais, Veronique

Keywords: Iridium complexes Bis-cyclometallated complexes Phosphine ligands Luminescence Blue phosphors

Abstract

Three cationic bis-cyclometallated iridium complexes [Ir(C^N-ppyMe)2(P^N)][PF6](1–3) with 4-methyl- 2-phenylpyridine (ppyMe) as the C^N-cyclometallated ligands and 8-(diphenylphosphino)quinoline (Ph2Pqn, L1), 2 (diphenylphosphinoamino)pyridine (Ph2PNHpy, L2) or 2 (diphenylphosphinoamino) pyrimidine (Ph2PNHpym, L3) as P^N-ligands, were prepared, and their crystal structures and photoluminescence were investigated. The substitution of an ‘‘aromatic CAr’’ (of a quinolyl group) by an ‘‘NH’’ bridge between the phosphine and imine ligating units of the P^N ligand dramatically changes the luminescence characteristics of the resulting complexes. The complexes 2–3 featuring the P–NH–N ligand emit in the blue region, whereas complex 1 incorporating the P–CAr–N unit displays orange photoluminescence.

Más información

Título de la Revista: POLYHEDRON
Volumen: 86
Editorial: PERGAMON-ELSEVIER SCIENCE LTD
Fecha de publicación: 2015
Página de inicio: 120
Página final: 124
Idioma: english
Financiamiento/Sponsor: LIA CNRS 836 Chili, Fondecyt
URL: https://www.journals.elsevier.com/polyhedron
DOI:

http://dx.doi.org/10.1016/j.poly.2014.06.027

Notas: ISI, SCOPUS