2055-56-3Relevant articles and documents
Organic electrophosphorescent material and application thereof
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Paragraph 0070; 0073; 0074; 0075, (2021/01/12)
The invention relates to the technical field of organic electroluminescent display, particularly discloses a novel organic electrophosphorescent material, and also discloses an application of the novel organic electrophosphorescent material in an organic light-emitting device. The organic electrophosphorescent material provided by the invention has a structure as shown in a general formula (I) inthe specification. The organic electrophosphorescent material disclosed by the invention is applied to the organic light-emitting device, and the prepared light-emitting device shows excellent performances of high purity, high brightness and high efficiency.
Reduction of polyfunctional aromatic nitro compounds using lithium aluminium hydride
Joseph,Jacob, Dominic E.
, p. 432 - 436 (2007/10/03)
Aromatic nitro compounds containing yet another functional group are reduced using lithium aluminium hydride in ether. The reduction of nitrobenzanilides results in preferential reduction of amide functionality while the isomeric N-(nitrophenyl) benzamides results in preferential cleavage of the amide bond. Besides, the reduction of 2,2′-dinitrodiphenyl amine 5a, reduction of (bis-2-nitroanilino) methane 5b, 2,2′ -dinitrodiphenylether 5c, 2-nitrophenyl-2′-nitrophenoxymethane 5d, 1,3-dinitrobenzene 6a, 2-nitrobenzaldoxime 6b, 2-N(2′-nitrophenylmethyl) amino benzoic acid 6c, 2-nitrophenoxymethyl phenyl ketone 6d are carried out. Nitro group is found reluctant towards reduction in some cases whereas in some others it is reduced into different extents. This points to the limitation of the suggested azo test for aromatic nitro compounds.
ELECTROCHEMICAL REDUCTION OF 2,2'-DINITRODIPHENYL ETHER AND 2,2'-DINITRODIPHENYLAMINE AT MERCURY CATHODES
Hlavaty, Jaromir,Volke, Jiri,Bakos, Viktor
, p. 379 - 393 (2007/10/02)
2,2'-Dinitrodiphenyl ether (I) is reduced at less negative potentials than 2,2'-dinitrodiphenylamine (II); the respective mechanisms of their reduction differ essentially. (I) is electrolytically reduced in a single wave with an uptake of eight electrons per molecule, giving rise to a bishydroxylamine intermediate which undergoes an intramolecular disproportionation.The resulting 2-nitroso-2'-amino-diphenyl ether undergoes a chemical follow-up reaction leading on the one hand to dibenzo--(1,4,5)-oxadiazepine, on the other hand to a diphenylamine product (resulting by a chemical rearrangement) which reacts with reductants present in the solution and yields dihydrophenazine.It is merely by chance that in the electrolytical reduction of II dihydrophenazine also results in addition to other products. 2,2'-dinitrodiphenylamine (II) enables here, however, a partial electrolytical reduction in which 2-amino-2'-nitrodiphenylamine is formed in a single 6-electron wave.In the following, more negative wave, is clearly separated only in alkaline media, the other nitro group reduces with an uptake of 4 electrons to an intermediate which eliminates the hydroxylamine group with the corresponding electron pair.The subsequent chemical reaction leads to dihydrophenazine.This substance is the reduced form of an chemically and electrochemically reversible system, this system participates in the chemical reaction of reaction intermediates.Its regeneration readily proceeds at potentials more positive than the reduction potential of II.Phenazine is oxidized in the catholyte by the hydroxylamine set free to phenazine N-oxide.Nitrogen is thus eliminated in its elemental form via hydroxylamine from the substrate molecule.
