Abstract:
Aminostyrylanthracene compounds of the general formula [I] [wherein R is unsubstituted aryl; R is aryl which may be substituted with one or more members selected from among various groups; and R to R are each hydrogen, cyano, hydrocarbyl, or the like]. These compounds can be prepared by condensing the corresponding aminobenzaldehydes with the corresponding phosphonic esters or phosphonium salts.
Abstract:
This invention provides an organic electroluminescent element which emits red light with high color purity, high luminance, and high reliability, owing to the compound used therein which has high fluorescence yields and good thermal stability. The organic electroluminescent element which is made up of a glass substrate (1), an ITO transparent electrode (2), a hole transfer layer (6), an electron transfer layer (7), and a metal electrode (3) (which are laminated in the order mentioned), with the hole transfer layer (6) and/or the electron transfer layer (7) being formed of a mixture containing at least one species of the aminostyryl compound represented by the following general formula ÄIÜ, and a hole blocking layer (30) is interposed between the hole transfer layer (6) and the electron transfer layer (7). General formula ÄIÜ Y -CH=CH-X -CH=CH-Y Äwhere, in the general formula ÄIÜ above, X denotes any aryl group such as a phenyl group having a substituent groups such as a nitro group, and Y and Y each is a group having an aminophenyl group in the skeleton.Ü
Abstract:
PROBLEM TO BE SOLVED: To provide an organic electroluminescent element using a suitable compound as an organic light-emitting material exhibiting especially red colored light at a most suitable wavelength, with a high luminance and being stable, the same compound, a synthetic intermediate of the same and a method for producing them. SOLUTION: This organic electroluminescent element installed with the organic layer having a light-emitting zone between a cathode and an anode is provided with that at least a part of the organic layer contains 1 kind of an aminostyrylnaphthalene compound expressed by general formula [I], [II] or [III] (R 1 , R 2 , R 11 , R 12 , R 23 and R 24 are each phenyl or naphthyl; R 3 , R 4 , R 13 , R 14 , R 25 and R 26 are each an electron-withdrawing group such as cyano or the like; and R 5 , R 15 and R 27 are each a substituent such as an alkyl). The compound is produced by a condensation reaction of 4-(N,N'-diarylamino)benzaldehyde with a Wittig Horner reagent, e.g 1,5-dicyanonaphthalene-2-phosphonic acid alkyl ester. COPYRIGHT: (C)2005,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide an organic electroluminescent element having high luminance, high performance, and stable reliability, where a luminous color (hue) and/or luminous efficiency have no dependence on driving conditions such as concentrations of a luminescent material contained in a luminous layer or applied voltages or the like. SOLUTION: The organic electroluminescent element comprises an anode 6, a hole-transfer layer 2, the luminous layer 3, and an electron-transfer layer 4, or the anode 6, the hole-transfer layer 2, and a luminous and electron-transfer layer 4. A luminescent region is formed by a mixed layer, which is held between the anode 6 and a cathode 7 as one thin film and composed of the luminescent material having charge transfer properties, which exhibits electroluminescence by applying a DC voltage, and a material for promoting charge injection, which has charge transfer capability that promotes charge injection into the luminescent material and is different from the luminescent material. The luminescent region exists at or near interfaces of adjacent layers as well as to a constant thickness in a layer thickness direction. COPYRIGHT: (C)2004,JPO
Abstract:
PROBLEM TO BE SOLVED: To provide an organic electroluminescent element having high reliability, which is very useful for realizing a stable full color display with high brightness. SOLUTION: For the organic electroluminescent element having an organic layer 5 with light emitting area between a positive electrode 2 and a negative electrode 3, the organic layer 5 contains a conductive polymer, to the principal chain or side chain of which, compounds having styryl or distyryl structure in its molecular structure, are chemically bonded.
Abstract:
PROBLEM TO BE SOLVED: To obtain the subject new compound useful as an organic luminescent material exhibiting strong luminescence and ranging especially from yellow to red. SOLUTION: This compound is represented by formula I (R2 and R3 are each an aryl; R1 and R4 are each formula II; one or more of R9, R10, R11, R12 and R13 are a >=2C oxyhydrocarbon group, or the like; one or more of R5, R6, R7 and R8 are H, cyano, or the like), preferably a compound of formula III. The compound of formula I, or the like, is obtained by condensation reaction of one or more of compounds of formula IV (R71 and R72 are each an aryl group corresponding to R1 group, R2 group, or the like), or the like e.g. 4-[N-phenyl-N-(4-ethoxyphenyl)amino]benzaldehyde} with a compound of formula V (R75 and R76 are each a hydrocarbon group; R77, R78, R79 and R80 are each a group corresponding to the groups from R5 to R8, or the like). The condensation reaction is performed by the Witting-Horner reaction and the compound of formula V, or the like, is condensed with the compound of formula IV, or the like, after the compound of formula V, or the like, is basified in a solvent. The compound of formula V, or the like, is obtained by reacting 2,5-di(bromomethyl)- terephthalonitrile, or the like, with triethyl phosphite, or the like.
Abstract:
PROBLEM TO BE SOLVED: To provide high luminance and stable red color light emission by including at least one kind of indole compound in an organic layer as an organic light emitting material. SOLUTION: A compound expressed by formula I is used as an indole compound contained in an organic layer. In formula I, R1, R2, R3 and R4 are mutually the same or different groups, and are an aryl group expressed by formula II. Here, in formula II, R11, R12, R13, R14 and R15 are mutually the same or different groups, and are a hydrogen atom or at least one of them is a saturated or unsaturated alkoxyl group, an alkyl group, an amino group or an alkyl amino group. The alkyl group is desirably a methyl group and a t-butyl group. In formula I, R5, R6, R7 and R8 are mutually the same or different groups, and at least one of them is a cyano group, a nitro group or a halogen atom.
Abstract:
PROBLEM TO BE SOLVED: To provide stable red color luminescence having high brightness by including a distyryl compound as an organic luminescent material in an organic layer arranged between an anode and a cathode. SOLUTION: An organic layer having luminescent region is arranged between an anode and a cathode. A distyryl compound represented by formula I is included as an organic luminescent material in the organic layer. In formula I, R1, R2, R3, and R4 are the same or different group, and are an aryl group represented by formula II. In formula II, R5, R6, R7, R8, and R9 are the same or different group, and are a hydrogen atom, or at least one of them is a saturated or non-saturated alkoxy group or alkyl group. The organic layer has organic laminated structure formed by stacking a hole transport layer, a luminescent layer, and an electron transport layer, and the distyryl compound is used as the forming material of them.
Abstract:
PROBLEM TO BE SOLVED: To provide an electroluminescent element having highly bright and stable red luminescence by using a distyryl compound as a luminescent material. SOLUTION: An organic layer contains a distyryl compound represented by formula I. In the formula I, R and R are a non-substituted phenyl group, R and R are an aryl group represented by formula II, R , R , R , and R are the same or a different group, and at least one of them is an amino group, a nitro group, or a halogen atom. R -R in formula II are the same or a different group, and at least one of them is an unsaturated alkoxy group having two or more carbon atoms, or an alkyl group. A compound represented by formula III, for example, of the distyryl compound can be used as a luminescent layer also acting as an electron transport layer or a luminescent layer also acting as a hole transport layer, and can be constituted as a luminescent layer interposed between the electron transport layer and the hole transport layer.