Abstract: A charging member includes a support and a surface layer. The surface layer contains a first compound and a second compound different from the first compound. The first compound is a polysiloxane having at least one unit selected from the group consisting of SiO4/2(Q) unit, SiO3/2(T) unit, and SiO2/2(D) unit. The second compound is an acrylic polymer having a quaternary ammonium group and a group having an organosiloxane bond.

Abstract: Provided is a charging member that suppresses the occurrence of abnormal discharge under low temperature and low humidity. The charging member includes a support and a surface layer on the support, and the surface layer contains a compound represented by the following formula (a), (b), (c), or (d).

Abstract: A pyrene compound represented by general formula (1): wherein X represents one of a naphthalene ring and phenanthrene ring: when X represents the naphthalene ring, a 1-pyrenyl group indicated in general formula (1) is bonded to a 2-position of the naphthalene ring; when X represents the phenanthrene ring, the 1-pyrenyl group is bonded to one of a 2-position and a 3-position of the phenanthrene ring; and R1 and R2 are each independently selected from a hydrogen atom and an alkyl group.

Abstract: There is provided a charging member having charging performance that is not easily changed even by long-term use. The charging member includes an electro-conductive support, an elastic layer, and a surface layer. The elastic layer contains particles in such a manner that at least a part of the particles are exposed from the elastic layer, and thus a surface of the elastic layer is roughened. The particles are high-molecular-weight polyethylene particles. The surface of the elastic layer is covered with the surface layer in such a manner that the surface shape of the elastic layer is reflected in the surface shape of the charging member. The surface layer contains a high-molecular compound having a specific constitutional unit.

Abstract: The present invention provides a charging member that suppresses abnormal discharge which induces charging unevenness, and that has little contamination on a surface layer, to thereby enable uniform charging over a long period. The charging member includes a substrate, an elastic layer and a surface layer, wherein the surface layer contains a polymer compound having constitutional units represented by the following general formula (1), chemical formula (2) and general formula (3), and having a Si—O—Ti bond, a Ti—O-M bond and a Si—O-M bond. M is any atom selected from the group consisting of V, Nb and W.

Abstract: Provided is a charging member whose surface is suppressed to adhesion of toner or an external additive and is not contaminated easily, and which is less likely to occur a track due to the contact between the charging member and a photosensitive member in an electrophotographic image. The charging member comprises a support, an elastic layer, and a surface layer, wherein the surface layer comprises: a constitutional unit represented by the following general formula (1); a constitutional unit represented by the following general formula (2); a polymer compound having a bond of Si—O—Ti; and phenyl-modified silicone oil having a particular structure.

Abstract: Provided is a method of producing a member for electrophotography capable of providing a high-quality electrophotographic image.

Abstract: There is provided a charging member having charging performance that is not easily changed even by long-term use. The charging member includes an electro-conductive support, an elastic layer, and a surface layer. The elastic layer contains particles in such a manner that at least a part of the particles are exposed from the elastic layer, and thus a surface of the elastic layer is roughened. The particles are high-molecular-weight polyethylene particles. The surface of the elastic layer is covered with the surface layer in such a manner that the surface shape of the elastic layer is reflected in the surface shape of the charging member. The surface layer contains a high-molecular compound having a specific constitutional unit.

Abstract: A pyrene compound represented by general formula (1): wherein X represents one of a naphthalene ring and a phenanthrene ring; when X represents the naphthalene ring, a 1-pyrenyl group indicated in general formula (1) is bonded to a 2-position of the naphthalene ring; when X represents the phenanthrene ring, the 1-pyrenyl group is bonded to one of a 2-position and a 3-position of the phenanthrene ring; and R1 and R2 are each independently selected from a hydrogen atom and an alkyl group.

Abstract: Disclosed are an organic semiconductor material including a thiazole compound represented by the following general formula (1) and an organic thin-film transistor using the organic semiconductor material: A1-B1-C1??(1) wherein A1 and C1 each represent an unsubstituted or substituted thiazole ring, and B1 represents an unsubstituted or substituted benzene ring or an unsubstituted or substituted polycondensed aromatic ring. Accordingly, there are provided an organic semiconductor material having high ON current and excellent storage stability and an organic thin-film transistor using the organic semiconductor material.

Abstract: Provided are a compound represented by the following general formula (1): A1-B1-X1-C1-D1 wherein A1 and D1 each represent an unsubstituted or substituted anthracene ring; B1 and C1 each represent an unsubstituted or substituted thiazole ring; and X1 represents a single bond or a divalent group, and an organic thin film transistor using the compound.

Abstract: The present invention provides an organic semiconductor device, which can be produced uniformly on a large substrate, having a high mobility and capable of greatly modulating the drain current by varying the voltage applied to a gate electrode. The present invention provides an organic semiconductor device having at least a substrate, an organic semiconductor, a gate insulating film and conductors, and having electrodes for applying bias, wherein a polymer layer, which is different from the gate insulating film, is provided in contact with the organic semiconductor, and the polymer layer is formed of a copolymer of methyl methacrylate and divinylbenzene, or the like; a process for producing the organic semiconductor device; and an organic semiconductor apparatus using the organic semiconductor device.

Abstract: Provided are a compound represented by the following general formula (1): A1-B1-X1-C1-D1 wherein A1 and D1 each represent an unsubstituted or substituted anthracene ring; B1 and C1 each represent an unsubstituted or substituted thiazole ring; and X1 represents a single bond or a divalent group, and an organic thin film transistor using the compound.

Abstract: The present invention provides an organic semiconductor device, which can be produced uniformly on a large substrate, having a high mobility and capable of greatly modulating the drain current by varying the voltage applied to a gate electrode. The present invention provides an organic semiconductor device having at least a substrate, an organic semiconductor, a gate insulating film and conductors, and having electrodes for applying bias, wherein a polymer layer, which is different from the gate insulating film, is provided in contact with the organic semiconductor, and the polymer layer is formed of a copolymer of methyl methacrylate and divinylbenzene, or the like; a process for producing the organic semiconductor device; and an organic semiconductor apparatus using the organic semiconductor device.

Abstract: Disclosed are an organic semiconductor material including a thiazole compound represented by the following general formula (1) and an organic thin-film transistor using the organic semiconductor material: A1-B1-C1??(1) wherein A1 and C1 each represent an unsubstituted or substituted thiazole ring, and B1 represents an unsubstituted or substituted benzene ring or an unsubstituted or substituted polycondensed aromatic ring. Accordingly, there are provided an organic semiconductor material having high ON current and excellent storage stability and an organic thin-film transistor using the organic semiconductor material.

Abstract: The present invention provides an organic semiconductor device, which can be produced uniformly on a large substrate, having a high mobility and capable of greatly modulating the drain current by varying the voltage applied to a gate electrode. The present invention provides an organic semiconductor device having at least a substrate, an organic semiconductor, a gate insulating film and conductors, and having electrodes for applying bias, wherein a polymer layer, which is different from the gate insulating film, is provided in contact with the organic semiconductor, and the polymer layer is formed of a copolymer of methyl methacrylate and divinylbenzene, or the like; a process for producing the organic semiconductor device; and an organic semiconductor apparatus using the organic semiconductor device.

Abstract: There are disclosed a disulfone compound of formula (1): wherein Ar denotes an aryl group that may have a substituent, R1 denotes a hydrogen atom or a protective group of a hydroxyl group and the wavy line means that the disulfone compound is an E or Z geometrical isomer or a mixture thereof, a method for producing the same, intermediate compounds therefore and a process for producing retinol through the disulfone compound.

Abstract: There are disclosed a disulfone compound of formula (1): 1

Abstract: There are disclosed a disulfone compound of formula (1): wherein Ar denotes an aryl group that may have a substituent, R1 denotes a hydrogen atom or a protective group of a hydroxyl group and the wavy line means that the disulfone compound is an E or Z geometrical isomer or a mixture thereof, a method for producing the same, intermediate compounds therefore and a process for producing retinol through the disulfone compound.

Abstract: There are disclosed a composition comprising