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: A nitrogen-containing heterocyclic compound is represented by Formula (I): wherein R1 represents a hydrogen atom, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, or a substituted or unsubstituted alkoxy group having 1 to 20 carbon atoms; A represents a heterocyclic residue that contains at least one nitrogen atom and forms a six-membered aromatic heterocyclic ring; and n represents an integer of from 1 to 3.

Abstract: An organic semiconductor transistor has plural electrodes and an organic semiconductor layer containing at least one compound represented by the following Formula (I). In Formula (I), each R1 independently represents a straight-chain alkyl group having from 3 to 20 carbon atoms, a straight-chain alkoxy group having from 3 to 20 carbon atoms, a branched alkyl group having from 3 to 20 carbon atoms, or a branched alkoxy group having from 3 to 20 carbon atom, and each R2 independently represents a hydrogen atom, a straight-chain alkyl group having from 1 to 20 carbon atoms, a straight-chain alkoxy group having from 1 to 20 carbon atoms, a branched alkyl group having from 3 to 20 carbon atoms, or a branched alkoxy group having from 3 to 20 carbon atoms.

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: A fluorene compound is provided, which is represented by the following Formula (I): in Formula (1), R11 and R12 each independently represent an alkyl group having 1 to 6 carbon atoms; R21 and R22 each independently represent an alkyl group having 1 to 8 carbon atoms, or an alkoxy group having 1 to 8 carbon atoms; and n1 and n2 each independently represent an integer of from 1 to 5.

Abstract: There is provided a quinoxaline-containing compound represented by the following formula (I); wherein Ar1 represents a substituted or unsubstituted monovalent aromatic group; and R1 represents a hydrogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted aryl group, or a substituted or unsubstituted aralkyl group.

Abstract: An image holding member for an image forming apparatus is disclosed which the image holding member includes a support and a photosensitive layer disposed on or above the support, the photosensitive layer including a compound including a partial structure represented by the following Formula (A), wherein 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 Each n each independently represent an integer of from 0 to 7.

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: An organic electroluminescent element which has a long lifetime and excellent manufacturability includes a charge-transporting polymer material having high mobility and solubility in solvents, and further includes a pair of electrodes and an organic compound layer sandwiched between the pair of electrodes, at least one of the electrodes being transparent, the organic compound layer being formed of one or more layers, and at least one of the one or more layers containing at least one charge-transporting polyester represented by Formula (I-1) or (I-2),

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: An organic electroluminescent device with a pair of electrodes having an anode and a cathode, and one or more organic compound layers disposed therebetween. One of the anode or the cathode is transparent or semitransparent.

Abstract: A thiophene-containing compound polymer represented by Y represents a bivalent hydrocarbon group; R5 represents a hydrogen atom; Z represents a bivalent hydrocarbon group; m represents 1; p represents an integer of 5 to 5,000; B and B? each represent OCH2CH2OH, and A represents a group represented by the following formula (X-III): Ar1 is a substituted or unsubstituted monovalent aromatic group; R1 to R3 each independently represent a hydrogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted aryl group, or a substituted or unsubstituted aralkyl group; and n representing an integer of 1 to 5.

Abstract: An organic electroluminescent device includes: a pair of electrodes including a positive electrode and a negative electrode, at least one of the electrodes being transparent or semi-transparent; and an organic compound layer including one or more layers interposed between the pair of electrodes, at least one layer included in the organic compound layer containing one or more compounds represented by the following formula (I): in formula (I), R1s each independently representing a linear alkyl, linear alkoxy, branched alkyl, or branched alkoxy group having from 3 to 20 carbon atoms; and R2s each independently representing a hydrogen atom, a linear alkyl group having from 1 to 20 carbon atoms, a linear alkoxy group having from 1 to 20 carbon atoms, a branched alkyl group having from 3 to 20 carbon atoms, or a branched alkoxy group having from 3 to 20 carbon atoms.

Abstract: A thiazolothiazole derivative is represented by the following Formula (I). In Formula (I), each R1 independently represents a straight chain alkyl group having 3 to 20 carbon atoms, a straight chain alkoxy group having 3 to 20 carbon atoms, a branched alkyl group having 3 to 20 carbon atoms, or a branched alkoxy group having 3 to 20 carbon atoms; and each R2 independently represents a hydrogen atom, a straight chain alkyl group having 1 to 20 carbon atoms, a straight chain alkoxy group having 1 to 20 carbon atoms, a branched alkyl group having 3 to 20 carbon atoms, or a branched alkoxy group having 3 to 20 carbon atoms.

Abstract: An organic semiconductor transistor has plural electrodes and an organic semiconductor layer containing at least one compound represented by the following Formula (I). In Formula (I), each R1 independently represents a straight-chain alkyl group having from 3 to 20 carbon atoms, a straight-chain alkoxy group having from 3 to 20 carbon atoms, a branched alkyl group having from 3 to 20 carbon atoms, or a branched alkoxy group having from 3 to 20 carbon atom, and each R2 independently represents a hydrogen atom, a straight-chain alkyl group having from 1 to 20 carbon atoms, a straight-chain alkoxy group having from 1 to 20 carbon atoms, a branched alkyl group having from 3 to 20 carbon atoms, or a branched alkoxy group having from 3 to 20 carbon atoms.

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.

Abstract: A nitrogen-containing heterocyclic compound is represented by Formula (I): wherein R1 represents a hydrogen atom, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, or a substituted or unsubstituted alkoxy group having 1 to 20 carbon atoms; A represents a heterocyclic residue that contains at least one nitrogen atom and forms a six-membered aromatic heterocyclic ring; and n represents an integer of from 1 to 3.

Abstract: A fluorene compound is provided, which is represented by the following Formula (I): in Formula (1), R11 and R12 each independently represent an alkyl group having 1 to 6 carbon atoms; R21 and R22 each independently represent an alkyl group having 1 to 8 carbon atoms, or an alkoxy group having 1 to 8 carbon atoms; and n1 and n2 each independently represent an integer of from 1 to 5.

Abstract: The present invention provides a carbazole compound represented by the following formula (I): wherein each Ar1 independently represents a substituted or unsubstituted monovalent aromatic group or an aromatic group containing a heteroring, and R1 and each R2 independently represent a hydrogen atom, an alkyl group, a substituted or unsubstituted aryl group, or a substituted or unsubstituted aralkyl group.

Abstract: An organic electroluminescent device having a pair of electrodes including a positive electrode and a negative electrode at least one of which is transparent or translucent, and one or more organic compound layers interposed between the pair of electrodes, at least one layer of the organic compound layers containing at least one charge transporting polyester having a repeating unit that contains at least one structure selected from structures represented by the following formula (I-1) as a partial structure.