Cao, Hongtao published the artcileIridium(III) complexes adopting 1,2-diphenyl-1H-benzoimidazole ligands for highly efficient organic light-emitting diodes with low efficiency roll-off and non-doped feature, SDS of cas: 2622-67-5, the publication is Journal of Materials Chemistry C: Materials for Optical and Electronic Devices (2014), 2(12), 2150-2159, database is CAplus.
Two novel Ir(III) complexes (pbi)2Ir(mtpy) (1) and (pbi)2Ir(pbim) (2) adopting 1,2-diphenyl-1H-benzoimidazole (Hpbi) as cyclometalated ligands were synthesized and characterized. Strong emissions at 501 and 536 nm with high luminescence quantum yields of 48 and 91% in CH2Cl2 at 298 K were obtained for 1 and 2, resp. The quantum chem. calculations and the photophys. properties indicated that the dominant 3MLCT (metal-to-ligand charge-transfer) state mixed with 3LLCT (ligand-to-ligand charge-transfer) and 3LC (ligand-centered 3π-π*) characters contributed to their phosphorescence emissions. Doped organic LEDs (OLEDs) based on 1 and 2 showed a peak current efficiency of 45.0 cd A-1 and power efficiency of 47.9 lm W-1 accompanied by low efficiency roll-off values. In their nondoped OLEDs, high efficiencies of 24.4 cd A-1 and 26.3 lm W-1 were achieved. These appealing results reveal that 1 and 2 open interesting perspectives for the development of high-performance OLEDs in the future.
Journal of Materials Chemistry C: Materials for Optical and Electronic Devices published new progress about 2622-67-5. 2622-67-5 belongs to imidazoles-derivatives, auxiliary class Benzimidazole,Benzene,Benzimidazole, name is 1,2-Diphenyl-1H-benzo[d]imidazole, and the molecular formula is C19H14N2, SDS of cas: 2622-67-5.
Referemce:
https://en.wikipedia.org/wiki/Imidazole,
Imidazole | C3H4N2 – PubChem