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To prepare new phosphorescent iridium(III) emitters, 2-phenyl-6-(1-phenyl-1-(pyridin-2-yl)ethyl)pyridine (H 2 L) has been designed and its reactions with [Ir(μ-Cl)(η 4 -COD)] 2 ( 1 , COD = 1,5-cyclooctadiene) have been studied. The products obtained depend on the refluxing temperature of the solvent. Thus, complexes Ir(κ 4 - C,C',N,N '-L)Cl(CO) ( 2 ), [Ir(η 4 -COD)(κ 2  -N,N' -H 2 L)][IrCl 2 (η 4 -COD)] ( 3 ), and [Ir(μ-Cl)(κ 4  -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(κ 4  -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.

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