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 [I], and a hole blocking layer (30) is interposed between the hole transfer layer (6) and the electron transfer layer (7).

Abstract: An electroluminescence device is disclosed, comprising at least three kinds of laminated bodies, in each of which an emission region is independently present in each of a hole transfer layer and an electron transfer layer, the laminated bodies comprising the hole transfer layers each comprising a layer comprising a common material, and the electron transfer layers each comprising a layer comprising a common material, and the electroluminescence device emitting at least three colors of light.

Abstract: Disclosed is an organic electroluminescence element capable of reducing reflection of light from an electrode layer, thereby ensuring a sufficient display contrast in the case where the element is used for a display. The organic luminescence element includes a first electrode layer; an organic electroluminescence layer formed adjacent to one surface of the first electrode layer; a second electrode layer formed adjacent to the other surface of the organic electroluminescence layer, the second electrode layer having an optical reflectance to visible light specified in a range of 50% or less; and a low optical reflection layer formed on the second electrode layer on the opposed side to the surface adjacent to the organic electroluminescence layer. The low optical reflection layer includes at least one or more layers including a layer having an optical reflectance to visible light specified in a range of 10% or less.

Abstract: An organic electroluminescent device comprising an organic layer having a luminescent region provided between an anode and a cathode, wherein the organic layer comprises a distyryl compound.

Abstract: An organic electroluminescent device of the type comprises an organic layer 5, 5a or 5b having a luminescent region and provided between an anode 2 and a cathode 3. The organic layer contains a distyryl compound represented by the following general formula (1).

Abstract: A light-emitting device comprises a layer including an emission region and provided between an anode and a cathode wherein the anode has a visible light (with a wavelength of 380 to 780 nm) transmittance ranging from 35 to 75%, and the anode has a work function of 3.0 to 7.0 eV whereby the device has an improved contrast characteristic while keeping high luminance.

Abstract: An organic electroluminescent device comprises an organic layer which has a luminescent region and which contains a distyryl compound represented by the following general formula (1). wherein R1, R2, R3 and R4 are, respectively, groups which may be the same or different and independently represent an aryl group of the following general formula (2), wherein R19, R20, R21, R22 and R23 are, respectively, groups which may be the same or different and represent a hydrogen atom provided that at least one of them a saturated or unsaturated alkoxyl group, an alkyl group, an amino group or an alkylamino group, and R5, R6, R7, R8, R9, R10, R11, R12, R13, R14, R15, R16, R17 and R18 are groups which may be the same or different provided that at least one of them represents a cyano group, a nitro group or a halogen atom.

Abstract: To provide compounds, which are suitable for use as an organic luminescent material capable of developing intense luminescence which is yellow to red, and a process for preparing in general and high efficiency. A bis(aminostyryl)benzene compound of the following general formula [I] is provided wherein R2 and R3 independently represent an unsubstituted aryl group, and R1 and R4 independently represent an aryl group, and R5 to R8, independently represent a cyano group or the like. A process for the preparation thereof is described wherein a 4-(N,N-diarylamino)benzaldehyde and a diphosphonic acid ester or diphosphonium are subjected to condensation reaction. Intermediates of the bis(aminostyryl)benzene compound are also described.

Abstract: An organic electroluminescent device of the type comprises an organic layer 5, 5a or 5b having a luminescent region and provided between an anode 2 and a cathode 3. The organic layer contains a distyryl compound represented by the following general formula (1).

Abstract: An optical recording medium having a structure including that a recording layer containing organic coloring matter and a reflecting layer that are sequentially formed on a light-transmissive substrate thereof so that an information signal is recorded/reproduced when the optical recording medium is irradiated with a laser beam made incident on the light-transmissive substrate, the optical recording medium incorporating: a light absorbing layer which is formed more adjacent to an incident point of the laser beam as compared with the reflecting layer, through which the laser beam passes and which absorbs light in an absorption wavelength region for the recording layer. Photo-deterioration of the recording layer composed of organic coloring matter occurs owing to a portion of natural light which has the wavelength which exists in the absorbing wavelength region for the organic coloring matter.

Abstract: An organic electroluminescent device of the type comprises an organic layer 5, 5a or 5b having a luminescent region and provided between an anode 2 and a cathode 3. The organic layer contains a distyryl compound represented by the following general formula (1). Chemical Formula 1 general formula (1): wherein R1, R2, R3 and R4 are, respectively, groups which may be the same or different and independently represent an aryl group of the following general formula (2). general formula (2): in which R9, R10, R11, R12 and R13 may be the same or different and, respectively, represent a hydrogen atom provided that at least one of them is a saturated or unsaturated alkoxyl group or an alkyl group, and R5, R6, R7 and R8 may be the same or different and, respectively, represent a hydrogen atom provided that at least one of them represents a cyano group, a nitro group or a halogen atom.

Abstract: An organic electroluminescent device of the type comprises an organic layer 5, 5a or 5b having a luminescent region and provided between an anode 2 and a cathode 3.

Abstract: A wavelength multiplexed optical recording material is disclosed wherein a photosensitive material including substituted porphine, such as tetra(pentafluorophenyl) porphine or tetra(4-methoxyphenyl) porphine, is uniformly dispersed into an optically transparent dispersion medium. When such wavelength multiplexed optical recording material is cooled to a temperature of liquid helium and irradiated with a laser beam, a large number of holes of narrow width are formed in an inhomogenous absorption band under the phenomenon of photochemical hole burning. As compared to unsubstituted porphine, the above porphine derivatives give an improved recording sensitivity and narrow hole width.

Abstract: A wavelength multiplexed optical recording material is disclosed wherein a photosensitive material including substituted porphine, such as tetra(pentafluorophenyl) porphine or tetra(4-methoxyphenyl) porphine, is uniformly dispersed into an optically transparent dispersion medium. When such wavelength multiplexed optical recording material is cooled to a temperature of liquid helium and irradiated with a laser beam, a large number of holes of narrow width are formed in an inhomogenous absorption band under the phenomenon of photochemical hole burning. As compared to unsubstituted porphine, the above porphine derivatives give an improved recording sensitivity and narrow hole width.

Abstract: An optical recording medium is disclosed, in which an optical recording layer and a reflective layer are formed on a transparent substrate. The recording layer contains a first compound having absorption or a recording laser light having a predetermined wavelength, and a second compound having substantially no absorption for a laser light having the predetermined wavelength and decomposable upon heat generation by the laser light in the optical recording layer.

Abstract: A photochromic photosensitive composition comprising a indolinobenzothipyran-based spiropyran compound, a transparent, high molecular weight film forming resin, and a compound represented by the general formula (I): ##STR1## wherein R.sub.1, R.sub.3, R.sub.4 and R.sub.6 each represents a hydrogen atom, a halogen atom or a hydroxyl group, R.sub.2 and R.sub.5 each represents a hydrogen atom or a hydroxyl group, and X represents --NH--, --S--, ##STR2## (where R.sub.7 and R.sub.8 each represents a hydrogen atom, --CH.sub.3, --C.sub.2 H.sub.5, --CH.sub.2 CH.sub.