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

Braulio Aranda, Pedro Aguirre, Sergio A. Moya, Mickaële Bonneau, J. A. Gareth Williams, Loic Toupet, Muriel Escadeillas, Hubert Le Bozec, Véronique Guerchais*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

12 Scopus citations

Abstract

Three cationic bis-cyclometallated iridium complexes [Ir(CN-ppyMe)2(PN)][PF6](1-3) with 4-methyl-2-phenylpyridine (ppyMe) as the CN-cyclometallated ligands and 8-(diphenylphosphino)quinoline (Ph2Pqn, L1), 2-(diphenylphosphinoamino)pyridine (Ph2PNHpy, L2) or 2-(diphenylphosphinoamino) pyrimidine (Ph2PNHpym, L3) as PN-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 PN 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.

Original languageEnglish (US)
Pages (from-to)120-124
Number of pages5
JournalPolyhedron
Volume86
DOIs
StatePublished - Jan 28 2015

Keywords

  • Bis-cyclometallated complexes
  • Blue phosphors
  • Iridium complexes
  • Luminescence
  • Phosphine ligands

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Inorganic Chemistry
  • Materials Chemistry

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