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 language | English (US) |
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Pages (from-to) | 120-124 |
Number of pages | 5 |
Journal | Polyhedron |
Volume | 86 |
DOIs | |
State | Published - 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