Abstract: Provided is an organic electroluminescent element which includes a pair of electrodes composed of a positive electrode and a negative electrode, with at least one of the electrodes being transparent or semi-transparent, and an organic compound layer interposed between the pair of electrodes and containing one or more charge transporting polyesters represented by the following formula (I) [in the formula (I), A1 represents at least one selected from structures represented by the following formula (II); and in the formula (II), X represents a group represented by the following formula (III)]:

Abstract: An electrophotographic photoreceptor includes an electroconductive substrate; a photosensitive layer that is provided on the electroconductive substrate; and an outermost surface layer, wherein the outermost surface layer is a layer made of a cured product of a composition that contains position isomer mixture of at least one kind among non-charge transporting compounds represented by Formulae (I) and (II) and at least one kind among non-reactive charge transporting materials.

Abstract: Provided is an organic electroluminescent element which includes a pair of electrodes composed of a positive electrode and a negative electrode, with at least one of the electrodes being transparent or semi-transparent, and an organic compound layer interposed between the pair of electrodes and containing one or more charge transporting polyesters represented by the following formula (I) [in the formula (I), A1 represents at least one selected from structures represented by the following formula (II); and in the formula (II), X represents a group represented by the following formula (III)]:

Abstract: Provided is a composition for forming a charge transporting film, including a solvent having a dielectric constant of 5.

Abstract: An electrophotographic photoreceptor includes a conductive substrate; a charge generating layer provided on the conductive substrate; a charge transporting layer provided on the charge generating layer, which is configured to include a charge transporting material and a polycarbonate; and an outermost surface layer provided on the charge transporting layer, which is constituted with a cured film formed of a composition including a chain polymerizable compound having at least a charge transporting skeleton and a chain polymerizable functional group in the same molecule, and has an A value represented by the following equation (1) being from 0.1 to 0.3, and a B value represented by the following equation (2) being 0.02 or less, each of which is determined by an Attenuated total reflection Fourier transform infrared spectroscopy: A=(S1/S13)?(S0/S03)??Equation (1) B=S2/S23??Equation (2).

Abstract: An electrophotographic photoreceptor includes an electroconductive substrate; a photosensitive layer that is provided on the electroconductive substrate; and an outermost surface layer, wherein the outermost surface layer is a layer made of a cured product of a composition that contains position isomer mixture of at least one kind among non-charge transporting compounds represented by Formulae (I) and (II) and at least one kind among non-reactive charge transporting materials.

Abstract: An electrophotographic photoreceptor includes an electroconductive substrate, a photosensitive layer provided on the electroconductive substrate, and an outermost surface layer, wherein the outermost surface layer is a layer constituted with a cured product of a composition including at least one of non-charge transporting compounds represented by formulae (I) and (II), and at least one non-reactive charge transporting material:

Abstract: Provided is a composition for forming a charge transporting film, including a solvent having a dielectric constant of 5.

Abstract: An image holding member for an image forming apparatus includes a support and a photosensitive layer disposed on the support. The photosensitive layer contains a charge generating material and a compound represented by the following formula (II-1): wherein in the formula (II-1), Y1's each independently represent a substituted or unsubstituted divalent hydrocarbon group; A1 represents a group represented by formula (II-2); R2's each independently represent a hydrogen atom, an alkyl group, a substituted or unsubstituted aryl group, or a substituted or unsubstituted aralkyl group; m's each independently represent an integer of from 1 to 5; and p represents an integer of from 5 to 5,000.

Abstract: An electrophotographic photoreceptor includes a conductive substrate, and a photosensitive layer provided on the conductive substrate, and an outermost surface layer of the electrophotographic photoreceptor is constituted with a polymerized product or crosslinked product of a composition including at least one selected from reactive compounds represented by the formulae (I) and (II) and a non-reactive charge transporting material, a content of the non-reactive charge transporting material in the composition is from 5% by weight to 40% by weight based on the weight of the outermost surface layer, and a content of the reactive compound before the reaction in the outermost surface layer is 3% by weight or less based on the weight of the outermost surface layer.

Abstract: Provided is an image holding member for an image forming apparatus including a support; and a photosensitive layer disposed on the support and containing a compound represented by the following formula (I): wherein in the formula (I), R1's each independently represent a substituted or unsubstituted, linear or branched alkyl group having from 1 to 8 carbon atoms; Ar's each independently represent a substituted or unsubstituted phenyl group, a substituted or unsubstituted monovalent polynuclear aromatic hydrocarbon group having two aromatic rings, a substituted or unsubstituted monovalent condensed aromatic hydrocarbon group having two or three aromatic rings, or a substituted or unsubstituted monovalent aromatic heterocyclic group; and n's each independently represent a number of from 0 to 7.

Abstract: Provided is an organic semiconductor transistor including plural electrodes, and an organic semiconductor layer containing at least one fluorene compound represented by the following formula (I): wherein R1 represents an alkyl group having from 1 to 8 carbon atoms; R2 and R3 each independently represent an alkyl group having from 1 to 8 carbon atoms, or an alkoxy group having from 1 to 8 carbon atoms; and n represents an integer of from 1 to 3.

Abstract: An image holding member for an image forming apparatus includes: a substrate; and a photosensitive layer on the substrate, the photosensitive layer containing a compound including a partial structure represented by the following Formula (II-2) wherein in Formula (II-2), Ar represents a substituted or unsubstituted phenyl group, a substituted or unsubstituted monovalent polynuclear aromatic hydrocarbon group having from 2 to 10 aromatic rings, a substituted or unsubstituted monovalent condensed aromatic hydrocarbon group having from 2 to 10 aromatic rings, or a substituted or unsubstituted monovalent aromatic heterocyclic group; q represents 0 or 1; and n's each independently represent an integer of from 0 to 7.

Abstract: Provided is an electrophotographic photoreceptor including a conductive substrate and a photosensitive layer provided on the conductive substrate, wherein an outermost surface layer includes a cured film of a composition containing inorganic particles having polymerizable groups and at least one selected from the reactive compounds represented by the following formulae (I) and (II): wherein F represents a charge transporting skeleton; L represents a divalent linking group; and m represents an integer of 1 to 8, wherein F represents a charge transporting skeleton; L? represents an (n+1)-valent linking group; m? represents an integer of 1 to 6; and n represents an integer of 2 to 3.

Abstract: Provided is an electrophotographic photoreceptor including a conductive substrate; a charge generating layer provided on the conductive substrate; a charge transporting layer provided on the charge generating layer; and an outermost surface layer provided on the charge transporting layer, wherein the charge transporting layer includes a charge transporting material and a polycarbonate copolymer having a solubility parameter as calculated by a Feders method of from 11.40 to 11.75, and the outermost surface layer includes a charge transporting material, fluorine-containing resin particles, and a fluorine-containing dispersant.

Abstract: A charge transporting film includes a cured film of a composition containing at least one selected from reactive compounds represented by the following Formula (I): wherein F represents a charge transporting skeleton, D represents a group represented by Formula (IIa), m represents an integer of from 1 to 8, E represents a group represented by Formula (IIb), L represents a (n+1)-valent linking group including two or more selected from the group consisting of an alkylene group, an alkenylene group, —C(?O)—, —N(R)—, —S—, —O—, and a trivalent or tetravalent group derived from alkane or alkene, R represents a hydrogen atom, an alkyl group, an aryl group, or an aralkyl group, n represents an integer of from 1 to 3, R0 represents a halogen atom, an alkyl group, or an alkoxy group, and n0 represents an integer of from 0 to 3.

Abstract: An organic electroluminescence element includes: a pair of electrodes composed of a positive electrode and a negative electrode, one of which is transparent or semitransparent; and one or more organic compound layers that are sandwiched between the pair of electrodes, in which at least one layer of the organic compound layers contains one or more of charge-transporting polyesters represented by formula (I).

Abstract: The invention provides a thiazolothiazole compound represented by the following Formula (I). In Formula (I), Ar1 represents a substituted or unsubstituted aromatic group; R1 represents a hydrogen atom, an alkyl group, a substituted or unsubstituted aryl group, or a substituted or unsubstituted aralkyl group; and n represents an integer of 0 or 1. The invention further provides a thiazolothiazole polymer having the thiazolothiazole compound as a polymerization unit thereof.

Abstract: Provided is a composition for forming a charge transporting film, including a solvent having a dielectric constant of 5.

Abstract: An organic semiconductor transistor has plural electrodes and an organic semiconductor layer including at least one compound represented by the following Formula (I). In Formula (I), each R is independently a hydrogen atom or an alkyl group; and n and m are each independently an integer of from 1 to 3.