ChemInform Abstract: Trinuclear Oxosulfato Complexes of Iridium.
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Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.Two red iridium(iii ) complexes with Ir–S–P–S structures were obtained rapidly at room temperature in 5 min with high yields, and their devices achieve good performances with a maximum external quantum efficiency of 24.90%.
Quantum Efficiency
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A series of 2-difluorophenyl-4-methoxypyridine ligands were synthesized and successfully used to prepare iridium complexes including bis[2-(2',3'-difluorophenyl)-4-methoxypyridinato-N,C2']iridium(III) [5-(2'-pyridyl)tetrazolate] (5a1), bis[2-(2',4'-difluorophenyl)-4-methoxypyridinato-N,C2']iridium(III) [5-(2'-pyridyl)tetrazolate] (5a2), bis[2-(2',5'-difluorophenyl)-4-methoxypyridinato-N,C2']iridium(III) [5-(2'-pyridyl)tetrazolate] (5a3), bis[2-(3',4'-difluorophenyl)-4-methoxypyridinato-N,C2']iridium(III) [5-(2'-pyridyl)tetrazolate] (5a4), and bis[2-(3',5'-difluorophenyl)-4-methoxypyridinato-N,C2']iridium(III) [5-(2'-pyridyl)tetrazolate] (5a5). Interestingly, 5a4 exhibits 2'-coordinated and 6'-coordinated isomers. The coordination behavior of this ligand with iridium metal differed depending on the repulsion energy and the delocalization energy effects of the iridium complexes. X-ray structural analysis technique was successfully applied to interpret the different coordination behavior of 5a4. In addition, introducing the methoxy group to the well-known ligand (2-difluorophenylpyridine) successfully expanded the band gap of iridium complexes and made 5a2 exhibit the bluest emission at 452 nm. To the best of our knowledge, this is one of the bluest OLEDs based on a 2-difluorophenylpyridine-iridium coordination emitter.
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Abstract Electrochemical or chemical (Ce(IV)) oxidation of Ir(H 2 O) 6 3+ in acidic solution gives a brown‐green product that titrates for Ir(V).
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This chapter contains sections titled: Introduction Ligand Field Splitting Photophysical Properties Phosphorescent Iridium Complexes Tuning of Phosphorescence Colors in Neutral Iridium Complexes Tuning of Phosphorescence Colors in Cationic Iridium Complexes Tuning of Phosphorescence Colors in Anionic Iridium Complexes Phosphorescent Color Shift in Anionic Iridium Complexes by Tuning of HOMO Levels Controlling Quantum Yields in Iridium Complexes Application of Iridium Complexes in Organic Light-Emitting Devices (OLEDs) Standard OLED Device Architecture Light-Emitting Electrochemical Cell (LEC) Device Architecture
Cationic polymerization
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Abstract Activation of N2O3 with iridium(I) complexes affords nitrosylnitrate complexes of iridium(III), Oxy-genation of these complexes and the reaction of N2O3 with iridium(I) complexes in the presence of oxygen give nitro-nitrato complexes of iridium(lll). These complexes are characterized by elemental analysis, IR spectra, conductivity and magnetic studies.
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Abstract Die Bildung des o‐Diphenylphosphinophenyl‐Ir(I)‐ Komplexes (I) erfolgt nur bei Behandlung des Chloro‐Ir‐Komplexes (II) mit Li‐ oder Chloro‐Mg‐Derivaten von C(2)‐methyl‐ oder ‐phenyl‐substituierten 1,2‐Carboranen.
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