High Intrinsic Phosphorescence Efficiency and Density Functional Theory Modeling of Ru(II)-Bipyridine Complexes with π-Aromatic-Rich Cyclometalated Ligands: Attributions of Spin–Orbit Coupling Perturbation and Efficient Configurational Mixing of Singlet Excited States
Abstract:A series of π-aromatic-rich
cyclometalated ruthenium(II)-(2,2′-bipyridine)
complexes ([Ru(bpy)2(πAr-CM)]+) in which πAr-CM is diphenylpyrazine or 1-phenylisoquinoline
were prepared. The [Ru(bpy)2(πAr-CM)]+ complexes had remarkably high phosphorescence rate constants, k
RAD(p), and the intrinsic phosphorescence efficiencies
(ιem(p) = k
RAD(p)/(νem(p))3) of these complexes were found to be twice
the magnitudes of simply constructed cyclometalated ruthenium(II)
complexes ([Ru(bpy)2(sc-CM)]+), where νem(p) is the … Show more
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