Abstract: This invention provides an optical information recording medium that can record information by laser beam irradiation. The optical information recording medium comprises a visible information recording layer on which visible information is to be recorded. The visible information recording layer contains a coloring matter, and at least one metal atom selected from the group consisting of Na, Mg, K, and Ca. The coloring matter is at least one material selected from the group consisting of oxonol coloring matter, cyanine coloring matter, azo coloring matter, phthalocyanine coloring matter, and pyrromethene coloring matter.

Abstract: To provide an organic electroluminescent device having excellent durability and having high luminous efficiency and luminance, which can be effectively utilized for surface light sources such as full color displays, backlights, and illuminating light sources and light source arrays such as printers, the organic electroluminescent device includes at least one organic compound layer containing a light emitting layer between a pair of electrodes, wherein the light emitting layer contains a host material and a phosphorescent material; the host material is a five-coordinate metal complex; and the phosphorescent material is at least one Ir complex having a specific partial structure.

Abstract: An organic electroluminescent device, which has a pair of electrodes and at least one organic layer including a luminescent layer between the pair of electrodes, wherein at least one layer between the pair of electrodes comprises at least one metal complex having a tridentate- or higher polydentate-chain structure ligand.

Abstract: An organic electroluminescent device, which has a pair of electrodes and at least one organic layer including a luminescent layer between the pair of electrodes, wherein at least one layer between the pair of electrodes comprises at least one metal complex having a tridentate- or higher polydentate-chain structure ligand.

Abstract: The present invention relates to a cationic compound denoted by the general formula (I). In general formula (I), Ar1 and Ar2 each independently denote an optionally substituted aryl group or aromatic heterocyclic group, L1 denotes a single bond or a divalent linkage group, with at least one from among Ar1, Ar2 and L1 comprising one or more onium cations; R3 and R4 each independently denote a substituent and may form a ring with a benzene ring substituted; m3 and m4 each independently denote an integer ranging from 0 to 4, and plural R3s and R4s may be identical or different from each other when m3 and m4 are an integer ranging from 2 to 4.

Abstract: A photoelectric conversion element is provided and includes: a conductive thin layer; an organic photoelectric conversion layer including a compound represented by formula (I); and a transparent conductive thin layer, in this order: In the formula (I), X represents O, S or N—R10; Rx and Ry each independently represents a hydrogen atom or a substituent, at least one of Rx and Ry is an electron-withdrawing group, and Rx and Ry may be connected to each other to form a ring, provided that Rx and Ry do not represent a cyano group at the same time; R7 to R10 each independently represents a hydrogen atom or a substituent, and R8 and R9 may be connected to each other to form a ring; L represents a linking group comprising a conjugated bond; and D1 represents a group of atoms.

Abstract: Provided is a method of manufacturing a bipyridinium compound denoted by general formula (A). In general formula (A), Ar1 and Ar2 each independently denote an optionally substituted (hetero)aryl group, R3 and R4 each independently denote a substituent that may form a ring with a pyridine ring to which the substituent substitutes, m3 and m4 each independently denote an integer ranging from 0 to 4, X denotes a halogen atom or RSO3, and R denotes an optionally substituted aryl group or alkyl group. The method can manufacture a 4,4?-bipyridinium compound under mild reaction conditions in an integrated manner without separation of intermediates.

Abstract: A light-emitting element comprises a substrate, a pair of opposed electrodes between which are provided a light-emitting layer containing at least one light-emitting material selected from compounds of general formula (I) and a host material, and which has an organic membrane having a larger ionization potential than that of the host material between the light-emitting layer and a cathode, with the organic membrane being in contact with the light-emitting layer: general formula (I) wherein R1 to R5 may be the same or different and each represents a hydrogen atom or a substituent, X represents an oxygen atom, a sulfur atom or N—RY1, RY1 represents a hydrogen atom or a substituent, L represents a linking group comprising a conjugated bond, RX and RY may be the same or different and each represents a hydrogen atom or a substituent, with at least one of them being an electron-withdrawing group.

Abstract: The optical recording medium comprises a visible information recording layer comprising at least two dyes of the following dyes. Ra1 to Rb3 each independently denote a hydrogen atom or a monovalent substituent, Ra2 and Ra3 may bond together to form a five to seven-membered heterocyclic ring, A denotes a substituted or unsubstituted aliphatic group, substituted or unsubstituted aryl group, or substituted or unsubstituted heterocyclic group, n denotes 0, 1, 2, or 3. Za21 and Za22 each independently denote an atom group forming an acidic nucleus, Ma21 to Ma23 each independently denote a substituted or unsubstituted methine group, Ka21 denotes an integer ranging from 0 to 3, and Q denotes a monovalent cation. A1=N—B1??General formula (III) A1 denotes a substituted or unsubstituted heterocyclic group, a substituted aliphatic group, or a substituted or unsubstituted carbocyclic group, and B1 denotes a substituted or unsubstituted heterocyclic group or a substituted or unsubstituted aryl group.

Abstract: The optical information recording medium comprises a recording layer on a support, wherein the recording layer comprises a dye having a film-softening temperature of equal to or higher than 290° C.

Abstract: An optical recording medium comprising a substrate having thereon a recording layer containing at least two kinds of dye A and dye B, wherein dye A and dye B satisfy the following conditions (1) and (2): (1) the starting temperature of decomposition is from 150 to 250° C., (2) refractive index n(A) and extinction coefficient k(A) of dye A at the wavelength of recording laser ray, and refractive index n(B) and extinction coefficient k(B) of dye B at the same wavelength satisfy the following expressions: n(B)/n(A)>0.7 k(B)/k(A)>10.

Abstract: A light-emitting material comprises a compound having a partial structure represented by the following formulas (8), (20) and tautomers thereof: wherein the variables are as defined in the specification.

Abstract: A silver halide color photographic photosensitive material having, on a support, at least one layer of a blue sensitive emulsion layer unit containing a yellow color forming coupler, a green sensitive emulsion layer unit containing a magenta color forming coupler, and a red sensitive emulsion layer unit containing a cyan color forming coupler, wherein 70% or more of the projection area of the entire silver halide grains has at least one layer of a silver halide photographic emulsion layer containing silver halide grains satisfying the following (a) to (c), and (1) the photosensitive material contains at least one inter-image effect providing layer, or (2) the photosensitive material contains a compound represented by the following Formula (I): (a) the material comprises a tabular silver halide host grain with an aspect ratio of 5 or more having two principal surfaces parallel with each other and a protrusion portion of silver halide epitaxially joined onto the surface of the tabular silver halide host grain,

Abstract: A light-emitting material comprises a compound having a partial structure represented by the following formulas (8), (20) and tautomers thereof: wherein the variables are as defined in the specification.

Abstract: An organic electroluminescent device comprising a pair of electrodes and a light emitting layer, a hole transport layer containing a hole transporting material, and an electron transport layer provided between the pair of electrodes wherein, the light emitting layer contains at least two host materials and at least one red phosphorescent material, and the hole transporting material in the hole transport layer has a small ionization potential than the two host materials in the light emitting layer.

Abstract: A process for producing a bipyridinium compound represented by formula (4), the process comprises: reacting a bipyridine which may have a substituent with a halogenated (hetero)aryl compound represented by formula (1), so as to produce N,N?-bis((hetero)asyl)-bipyridimium compound represented by formula (2); and reacting the N,N?-bis((hetero)aryl)-bipyridinium compound with an amine compound represented by formula (3), without subjecting the N,N?-bis((hetero)aryl)-bipyridinium compound to an isolation treatment, In formula, R represents a (hetero)aryl group; X represents a halogen atom; R11, R12, R13, R14, R15, R16, R17 and R18 each independently represents a hydrogen atom or a substituent; and R1 represents a (hetero)aryl group which may have a substituent or an alkyl group, wherein a polyhychic alcohol is used as a reaction solvent.

Abstract: An organic electroluminescent device, which has a pair of electrodes and at least one organic layer including a luminescent layer between the pair of electrodes, wherein at least one layer between the pair of electrodes comprises at least one metal complex having a tridentate- or higher polydentate-chain structure ligand.

Abstract: An organic electroluminescent device comprising: a pair of electrodes; and at least one organic layer between the pair of electrodes, the at least one organic layer between the pair of electrodes, the at least one organic layer including a luminescent layer, wherein the luminescent layer contains at least one electron injection/transport compound, at least one hole injection/transport compound, and at least one green or blue phosphorescent compound; and the electron injection/transport compound and the hole injection/transport compound each has a minimum triplet exciton energy value which is equal to or more than that of the green or blue phosphorescent compound.

Abstract: A photoelectric conversion device comprises: at least two electrodes; and an organic photoelectric conversion film intervening between said at least two electrodes, the organic photoelectric conversion film comprising a positive hole transporting material containing an arylidene compound having a specific structure.

Abstract: A silver halide color photographic photosensitive material having, on a support, at least one layer of a blue sensitive emulsion layer unit containing a yellow color forming coupler, a green sensitive emulsion layer unit containing a magenta color forming coupler, and a red sensitive emulsion layer unit containing a cyan color forming coupler, wherein 70% or more of the projection area of the entire silver halide grains has at least one layer of a silver halide photographic emulsion layer containing silver halide grains satisfying the following (a) to (c), and (1) the photosensitive material contains at least one inter-image effect providing layer, or (2) the photosensitive material contains a compound represented by the following Formula (I): (a) the material comprises a tabular silver halide host grain with an aspect ratio of 5 or more having two principal surfaces parallel with each other and a protrusion portion of silver halide epitaxially joined onto the surface of the tabular silver halide host grain,