Abstract: An electrophotographic photoconductor is composed of an electroconductive substrate and a photoconductive layer formed thereon including a m-phenylenediamine derivative of formula (I): ##STR1## wherein Ar represents a non-condensed polycyclic hydrocarbon group other than a phenyl group, or a condensed polycyclic hydrocarbon group having not more than 18 carbon atoms; and R.sup.1, R.sup.2, R.sup.3 and R.sup.4 each represent hydrogen a halogen atom a cyano group, a nitro group, an alkyl group, an alkoxyl group, an aryl group, an aryloxy group, an alkylmercapto group, a group represented by ##STR2## in which R.sup.6 and R.sup.7 each represent hydrogen, an alkyl group, or an aryl group, an alkylenedioxy group or an alkylenedithio group. Novel m-phenylenediamine derivatives for use in the electrophotoconductor and intermediates for producing the m-phenylenediamine derivatives, and methods of those derivatives are disclosed.

Abstract: An electrophotographic photoconductor composed of an electroconductive substrate and a photoconductive layer formed thereon, containing an interpenetrating polymer network prepared by polymerizing a composition composed of a binder resin and at least one polymerizable carbon-carbon double-bond-containing charge transporting monomer selected from the group consisting of monomers of formulas (I), (II) and (III) by the application of light or heat thereto: ##STR1##

Abstract: An electrophotographic printing plate precursor is disclosed, which comprises an electrically conductive support having thereon a photoconductive layer containing a photoconductive pigment and binder resin which is designated to undergo an electrophotographic process wherein a toner image is formed and the photoconductive layer in the non-image portion other than the toner image portion is then removed to form a printing plate, wherein said photoconductive pigment is a phthalocyanine pigment and said photoconductive layer further comprises at least one compound selected from the compounds represented by the formulae (I), (II) and (III): ##STR1## wherein Z represents a sulfur atom or an oxygen atom, R.sup.1 represents an alkyl group, an alkoxy group, a single ring or double condensed ring aryl group, a single ring or a double condensed ring aryloxy group, or a univalent group derived from a heterocyclic ring, and the two R.sup.1 groups in general formula (III) may be the same or different;R.sup.2 and R.sup.

Abstract: An electrophotosensitive material containing, as a charge-generating agent, a compound represented by the following general formula (1), ##STR1## wherein Cp is an azo coupling component, Y is a divalent organic group containing at least one aromatic ring or heterocyclic ring, R1 and R8 are alkyl groups or halogen atoms, respectively, and R2 and R4 are alkyl groups, halogen atoms or hydrogen atoms, respectively. The charge-generating agent used here remains chemically stable and exhibits excellent recurring property and charge-forming efficiency.

Abstract: An electrophotographic photoreceptor comprising a conductive substrate having formed thereon a photosensitive layer containing at least a charge generating material, a charge transporting material, and a binder resin, wherein said charge transporting material comprises a benzidine compound and/or a low-molecular weight charge transporting material having a molecular weight of from 200 to 400 and said binder resin mainly comprises a polycarbonate resin comprising a recurring unit represented by formula (I): ##STR1## and having a viscosity-average molecular weight ranging from 50,000 and 100,000, said charge transporting material and said binder resin being at a weight ratio of from 25:75 to 60:40. The photoreceptor exhibits improved abrasion resistance and improved peeling resistance while retaining excellent electrical and image characteristics.

Abstract: A photosensitive material for electrophotography, comprises a support and, provided thereon, an organic photoconductive layer of single-layer structure comprising a binder polymer, an electron acceptor substance particulately dispersed in the binder polymer, and a metal-free phthalocyanine molecularly dispersed in the binder polymer.

Abstract: The present invention provides a new distyryl compound represented by the following general formula [I] or [II]. ##STR1## The present invention provides a photosensitive member and an electroluminescence device both of which comprise the distyryl compound of the general formula [I] or [II] as a charge transporting material.

Abstract: An electrophotographic photosensitive member is disclosed which has a photosensitive layer on a conductive support. The photosensitive layer contains an azo pigment of Formula (1):Ar--(--N.dbd.N--Cp).sub.n.Also, disclosed are an electrophotographic apparatus, a device unit, and a facsimile machine using the electrophotographic photosensitive member.

Abstract: A photoconductor for electrophotography comprises an electroconductive substrate and a photosensitive layer formed on the conductive substrate and including a charge generating material and a charge transporting material. The charge transporting material comprises at least one compound selected from indole compounds represented by the following general formula (I) and at least one compound selected from benzidine compounds represented by the following general formula (II).

Abstract: An electrophotographic photoreceptor having a high chargeability and a low dark decay is disclosed, which comprises an electrically conductive support having formed thereon a light-sensitive layer containing as a charge generating material a pigment which has been subjected to an acid washing treatment to lower the content of metal impurities below 500 ppm or less.

Abstract: Electrophotographic elements including near-infrared radiation absorbing sensitizers and selected near-infrared radiation absorbing additives exhibit a reduced tendency toward the formation of laser interference patterns. These elements can be utilized in electrophotographic imaging processes including the steps of electrostatically charging the element, imagewise exposing the charged element to near-infrared radiation to form an electrostatic latent image, developing the electrostatic latent image by applying charged toner particles to the element to produce a toned image, and transferring the toned image to a suitable receiver.

Abstract: The invention provides an electrophotographic photoreceptor excellent in various characteristics, especially effectively protected from light fatigue and stable against repeated use. The photoreceptor comprises an electroconductive substrate having placed thereon a photosensitive layer which contains a bisazo compound of the formula [I]: ##STR1## a diamine derivative of the formula [IV]: ##STR2## and a specific amount of a phenolic antioxidant, and the photoreceptor contains, if necessary, an intermediate layer between the electroconductive substrate and the photosensitive layer.

Abstract: The present invention relates to photoconductors composed of low molecular weight or polymeric organic compounds with liquid crystal properties, where the photoconduction in the discotic phase is higher than in the non-liquid-crystal phases, and to a method for increasing the photoconductivity by molecular ordering in photoconductors.

Abstract: The photoconductor for electrophotography comprises an electroconductive substrate and a photosensitive layer formed on the substrate. The photosensitive layer may be a monolayer or function-separated laminate type one which comprise a charge generating layer and a charge transporting layer laminated one on another. The charge transporting layer contains a specified diamine compound represented by general formula (I) below as the charge transporting substance. ##STR1## wherein R.sub.1 and R.sub.2, which are the same or different, each represent independently an alkyl group, an alkoxy group, or a halogen atom; R.sub.3, R.sub.4, R.sub.5 and R.sub.6, which are the same or different, each represent independently an aryl group or an alkyl group, or R.sub.3 and R.sub.4, or R.sub.5 and R.sub.6, combine and form a condensed aromatic ring; and X represents an oxygen atom, a sulfur atom, a carbonyl group, or a sulfonyl group.

Abstract: Crystals of hydroxygallium phthalocyanine, a method of preparing the crystals, a photoconductive material containing the crystals, and an electrophotographic photoreceptor having the material. The photoreceptor has excellent electrophotographic characteristics. The crystals of hydroxygallium phthalocyanine have distinct diffraction peaks at (i) 7.5.degree., 9.9.degree., 12.5.degree., 16.3.degree., 18.6.degree., 25.1.degree. and 28.3.degree., or (ii) 7.7.degree., 16.5.degree., 25.1.degree. and 26.6.degree., or (iii) 7.9.degree., 16.5.degree., 24.4.degree. and 27.6.degree., or (iv) 7.0.degree., 7.5.degree., 10.5.degree., 11.7.degree., 12.7.degree., 17.3.degree., 18.1.degree., 24.5.degree., 26.2.degree. and 27.1.degree., or (v) 6.8.degree., 12.8.degree., 15.8.degree. and 26.0.degree. or (vi) 7.4.degree., 9.9.degree., 25.0.degree., 26.0.degree., and 28.2.degree. of the Bragg angle (2.theta..+-.0.2) in the X-ray diffraction spectrum.

Abstract: An electrophotographic photoreceptor comprising an electrically conductive substrate and a photosensitive layer formed thereon, wherein said photosensitive layer contains an arylamine compound of the following formula (I): ##STR1## wherein X is a hydrogen atom or a group of the formula (II): ##STR2## Y is a group of the formula (III) or (IV):--O--A.sup.1 --O-- (III)--A.sup.2 --O--A.sup.3 -- (IV)wherein, the substituents are defined hereafter.

Abstract: The present invention provides an electrophotographic photoreceptor high in sensitivity and endurance and highly resistant against oxidizing action with ozone or the like which comprises an electrically conductive support and, provided thereon, a light-sensitive layer which contains at least one azo compound containing a coupler component represented by the following formula [I] or [II]: ##STR1## wherein X represents a heterocyclic or aromatic ring residue which may have a substituent fusing with the benzene ring, Y represents a linkage group, R.sup.1 -R.sup.4 each represents a hydrogen atom or an alkyl group and R.sup.5 represents a hydrogen atom or an alkyl, aralkyl or acyl group which may have a substituent; ##STR2## wherein X and Y are as defined above and R.sup.6 and R.sup.7 each represents a hydrogen atom or an alkyl group which may have a substituent.

Abstract: The invention provides an electrophotographic photoreceptor which has a practical high sensitivity to red light or infrared ray, especially semiconductor laser beam and is excellent in storage stability. The photoconductor layer of this photoreceptor comprises comprises an inorganic photoconductor, a binder resin, a sensitizing dye and optionally an acid anhydride, wherein said sensitizing dye is at least one of dye compounds represented by the following formulas [I], [II], [III] and [IV]: ##STR1## In the above formulas, the respective symbols are as defined hereinbefore.

Abstract: The invention presents an electrophotosensitive material comprising a conductive substrate, a photosensitive layer formed on the conductive substrate, and, if necessary, a surface protective layer formed on the photosensitive layer, wherein an oxadiazole derivative expressed in a general formula (I): ##STR1## where R.sup.1 denotes an alkyl group, is contained as an electron transfer substance on the photosensitive layer and/or surface protective layer. This photosensitive material enhances the electron transfer capability, and hence the sensitivity is improved. At the same time, the residual potential of the photosensitive material is lowered, and the stability and durability against repeated exposures are enhanced.

Abstract: A photosensitive member for electrophotography has a photosensitive layer provided on a photoconductive substrate. The photosensitive layer contains at least one of indole derivatives represented by a chemical formula (I): ##STR1## wherein R.sub.1 and R.sub.2 are members selected from a group consisting of hydrogen atom and alkyl, aralkyl, allyl and alkoxy groups having 1-9 carbon atoms (but R.sub.1 and R.sub.2 do not stand for hydrogen atoms at the same time); R.sub.3 is a member selected from a group consisting of hydrogen and halogen atoms and alkyl and alkoxy groups having 1-3 carbon atoms; X is a member selected from a group consisting of alkylen, allylen, carbonyl, sulfonyl, sulfinyl and sulfide groups and oxygen atom; and n stands for an integer of 0 or 1.

Abstract: An electrophotographic method for liquid toner development using an organic, positive-charging photo-conductor (<+>OPC) is disclosed. The (+) OPC has a conductive substrate, and a polymeric binder with polar and non-polar functional moieties, the binder being a layer on the substrate greater than or equal to about 1 micron thick. Also, the (+) OPC has a phthalocyanine pigment component, and an arylamine sensitizer component selected from the group of:N--Ar(R.sub.i).sub.n, i=1,2,3; n=0,5whereAr=phenyl, naphthyl, biphenyl or ter-phenyl groups, and--(O--C-phenyl-N-phenyl).sub. x, x =1-10,both the phthalocyanine component and the arylamine sensitizer component being uniformly distributed throughout the binder component.

Abstract: A phthalocyanine mixed crystal comprising a halogenated indium phthalocyanine and a halogenated gallium phthalocyanine and an electrophotographic photoreceptor containing the phthalocyanine mixed crystal. The phthalocyanine mixed crystal is a charge generating material which provides an electrophotographic photoreceptor excellent in sensitivity, stability on repeated use, and environmental stability.

Abstract: An electrophotographic imaging member including a support layer and at least one electrophotoconductive layer, the imaging member comprising a polyarylamine polymer represented by the following formula: ##STR1## wherein: n is between about 5 and about 5,000p is between about 0 and about 5,000X' and X" are independently selected from a group having bifunctional linkages,Q is a divalent group derived from certain hydroxy terminated arylamine reactants, andQ' is a divalent group derived from a hydroxy terminated group.This imaging member is used in an electrophotographic imaging process.

Abstract: An electrophotographic photoconductor is composed of an electroconductive substrate and a photoconductive layer formed thereon, the photoconductive layer includes a dipyrenylamine derivative of formula (I): ##STR1## wherein R represents an alkyl group with 1 to 12 carbon atoms, which may have a substituent, or an aryl group which may have a substituent. Novel dipyrenylamine derivatives of formula (I), in which R is --ph--(R.sup.4)n, wherein, ph is a phenyl group, R.sup.4 is hydrogen, an unsubstituted or substituted alkyl group having 1 to 12 carbon atoms, an unsubstituted or substituted alkoxyl group having 1 to 12 carbon atoms, n is an integer of 1 to 5, and when n is 2 to 5, R.sup.4 may be the same or different, which are for use in the photoconductive layer of the electrophotographic photoconductor, are synthesized.

Abstract: A layered photoreceptor is composed of a substrate, an extrinsic pigment layer that has been sensitized disposed over the substrate, and a charge transport polymer in contact with the pigment layer. A method for producing a photoreceptor comprises depositing a layer of sensitizing electron donor material in a polymer binder on a substrate. An extrinsic pigment layer is deposited on the layer of sensitizing electron donor material. A charge transport layer is deposited on the pigment layer.

Abstract: An electrophotographic photoconductor is composed of an electroconductive substrate, and a photoconductive layer, formed thereon, which contains a charge generating material, and a vinylidene compound of formula (I): ##STR1## wherein Ar represents a metallocene group; and X represents cyano group, an alkyl group having 1 to 8 carbon atoms, or an alkoxycarbonyl group represented by --COOC.sub.n H.sub.2n+1, in which n is an integer of 1 to 8; or a vinylidene compound of formula (II):Ar--CH.dbd.C(COOR).sub.2 (II)wherein Ar represents a metallocene group; and R represents an alkyl group having 1 to 8 carbon atoms, which may form a ring in combination of two of the alkyl groups, each of these vinylidene compounds serving as a charge transporting material.

Abstract: An electrophotographic photoreceptor is disclosed. The photoreceptor comprises a conductive substrate and a photosensitive layer provided on the substrate. The photosensitive layer comprises titanylphthalocyanine having a peak at a Bragg angle 2.theta. of 27.2.degree..+-.2.degree. in the Cu-K.alpha. X ray-diffraction spectrum thereof and an alkyldiol which has 3 to 12 carbon atoms and the two hydroxyl group is bonded to carbon atoms arranged at different position in the molecular thereof. The amount of the diol is 0.1 to 1000 parts by weight per 100 parts by weight of the titanyl-phthalocyanine.

Abstract: An electrophotographic photoconductor is disclosed, which comprises an electroconductive support and a photoconductive layer formed thereon comprising a bisazo pigment having the formula (I) serving as a charge generating material: ##STR1## wherein Ar represents a residual group of a coupler represented by ArH selected from the group consisting of: an aromatic hydrocarbon compound having a hydroxyl group, a heterocyclic compound having a hydroxyl group, an aromatic hydrocarbon compound having an amino group, a heterocyclic compound having an amino group, an aromatic hydrocarbon compound having a hydroxyl group and an amino group, a heterocyclic compound having a hydroxyl group and an amino group, an aliphatic compound having an enolic ketone group, and an aromatic hydrocarbon compound having an enolic ketone group. Further, charge generating materials and novel bisazo pigments for use in the electrophotographic photoconductor are disclosed.

Abstract: An electrophotographic photoreceptor is provided with a photosensitive layer, which contains an azo compound represented by the following g general formula (1): ##STR1## wherein A means a coupler residuum having phenolic OH radicals, R.sub.1 and R.sub.2 designate, respectively, a radical of an integer of, both, m=0.about.4, n =0.about.4, selected from the group consisting of hydrogen, halogen atoms, alkyl group, alkoxy group, and di-substituted amino group.The electrophotographic photoreceptor of this invention has excellent electrification characteristics, sensitivity characteristics and image-forming property as well as good sensitivity. In addition, its sensitivity and electrification characteristics undergo less variations even when employed repeatedly. It also undergoes little light-induced fatigue. It has high weatherability.

Abstract: Disclosed is an electrophotographic photoreceptor which comprises a conductive substrate and a photoreceptive layer provided thereon, wherein the photoreceptive layer contains at least one of perylene compounds represented by Formula (I) and Formula (II) as the carrier-generating material, and a stryl compound represented by Formula (III) as the carrier-transport material, ##STR1## wherein Z represents each a substituted or non-substituted divalent aromatic group, ##STR2## wherein Ar.sub.1, Ar2 and Ar3 each represents a substituted or non-substituted aromatic group, n is an integer of 2 or 3.An electrophotographic photoreceptor according to this invention is improved in photosensitivity, residual potential and photoreception speed.

Abstract: An electrophotographic photoconductor is composed of an electroconductive substrate and a photoconductive layer formed thereon including a m-phenylenediamine derivative of formula (I): ##STR1## wherein Ar represents a non-condensed polycyclic hydrocarbon group other than a phenyl group, or a condensed polycyclic hydrocarbon group having not more than 18 carbon atoms; and R.sup.1, R.sup.2, R.sup.3 and R.sup.4 each represent hydrogen a halogen atom a cyano group, a nitro group, an alkyl group, an alkoxyl group, an aryl group, an aryloxy group, an alkylmercapto group, a group represented by ##STR2## in which R.sup.6 and R.sup.7 each represent hydrogen, an alkyl group, or an aryl group, an alkylenedioxy group or an alkylenedithio group. Novel m-phenylenediamine derivatives for use in the electrophotoconductor and intermediates for producing the m-phenylenediamine derivatives, and methods of those derivatives are disclosed.

Abstract: An electrophotographic organic photosensitive layer is formed by using a diphenoquinone derivative A and a diphenoquinone derivative B having a larger absolute value for reduction potential as electron transport materials. The diphenoquinone derivative A is, for example, 3,5-dimethyl-3',5'-di-t-butyl-4,4'-diphenoquinone. The diphenoquinone derivative B is, for example, 3,3',5,5'-tetra-t-butyl-4,4'-diphenoquinone. The diphenoquinone derivative B is included in the proportion of 3 to 50 wt % on the basis of the total weight of the electron transport materials (the diphenoquinone derivatives A and B).

Abstract: The organic photosensitive material for electrophotography in accordance with this invention is characterized in that a non-symmetrically substituted diphenoquinone derivative represented by the following formulae ##STR1## wherein each of R.sub.1 and R.sub.2 represents an alkyl or aryl group, R.sub.2 having larger carbon atoms than R.sub.1, is used as an electron transporting agent. This photosensitive material has a residual potential limited to a low level, and shows excellent sensitivity in both positive charging and negative charging.

Abstract: An electrophotographic photoreceptor is disclosed. The photoreceptor comprises a conductive layer and provided thereon, a photoreceptor layer comprising a carrier generation layer containing 100 parts by weight of a polycyclic quinone compound and 0.

Abstract: The photoconductor for electrophotography comprises an electroconductive substrate and a photosensitive layer formed on the substrate. The photosensitive layer may be a monolayer or function-separated laminate type one which comprise a charge generating layer and a charge transporting layer laminated one on another. The charge generating layer contains a specified benzidine compound represented by general formula (I) below as the charge transporting substance. ##STR1## wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4, which are the same or different, each represent independently an aryl group, an alkylaryl group, an alkoxyaryl group or a halogenated aryl group provided that R.sub.1 and R.sub.2, or R.sub.3 and R.sub.4, or both combine and form a condensed aromatic group with the nitrogen atom to which they are bonded, respectively; R.sub.5 and R.sub.6 each represent independently a hydrogen atom, an alkyl group, an alkoxy group, or a halogen atom.

Abstract: An electrophotographic photoconductor is composed of an electroconductive substrate and a photoconductive layer formed thereon including a diamine compound of formula (I): ##STR1## wherein R.sup.1 represents an alkyl group having 1 to 4 carbon atoms, or an aryl group; R.sup.2 represents hydrogen, an alkyl group having 1 to 4 carbon atoms, or an alkoxyl group having 1 to 4 carbon atoms; n is an integer of 1 to 3; and ##STR2## represents an arylene group or a bivalent group of a heterocyclic compound. A diamine compound for use in the electrophotographic photoconductor is also disclosed.

Abstract: An electrophotographic photoreceptor is disclosed. The photoreceptor comprises a conductive support and a photosensitive layer provided thereon. The photosensitive layer contains a carrier generation material and a compound represented by the following formula 1, 2 or 3; ##STR1## wherein R.sub.1, R.sub.11 and R.sub.21 are each a hydrogen atom, an alkyl group, an alkoxy group, a cycloalkyl group, an alkenyl group, an aryl group, and aryloxy group or a heterocylic group; R.sub.2 to R.sub.9, R.sub.12 to R.sub.19 and R.sub.22 to R.sub.29 are independently a hydrogen atom, a halogen atom, an alkyl group, an alkoxy group, a cycloalkyl group, an aryl group or a heterocyclic group, said groups represented by R.sub.1 to R.sub.9, R.sub.11 to R.sub.19 and R.sub.21 to R.sub.29 each may have a substituent selected form a halogen atom, an alkyl group, an alkoxy group, an aryl group, an aryloxy group, a thioether group, an acyl group and sulfonamido group.

Abstract: A photosensitive member is disclosed, which comprises a photosensitive layer containing a fluorescent bleaching agent comprising a coumarin compound represented by the formula (I): ##STR1##

Abstract: A photoconductor for electrophotography comprises an electroconductive substrate and a photosensitive layer formed on the substrate. The photosensitive layer includes a novel bisazo compound as a charge generating substance therein. The bisazo compound is represented by the following general formula: ##STR1## wherein, A stands for a coupler residue.

Abstract: A photoconductor for electrophotography comprises an electroconductive substrate and a photosensitive layer formed on the substrate. The photosensitive layer includes a novel bisazo compound as a charge generating substance therein. The bisazo compound is represented by the following general formula: ##STR1## wherein, A stands for a coupler residue.

Abstract: Photoconductive elements which have high sensitivity to radiation in the near-infrared region of the electromagnetic spectrum comprise a conductive support, a charge generation material which includes a near-infrared-sensitive organic pigment and, electrically contiguous with the charge generation material, an aggregate photoconductive material. A preferred embodiment is bimodal.

Abstract: An azo compound represented by the following general formula IA and an electrophotographic photosensitive member comprising a photosensitive layer containing the azo compound: ##STR1## wherein R.sup.1 and R.sup.2 are the same or different from each other and indicate a hydrogen atom, an alkyl group, an alkenyl group, a hydroxyl group, an alkoxy group, a carboxy group, an alkoxy carbonyl group, an acyl group, an aryl group, a halogen group or a cyano group, respectively; R.sup.14 indicates a hydrogen atom, a halogen group, an alkyl group, an alkoxy group, an aryl group, an amino group, a cyano group, a nitro group or a sulfoxide group; and A indicates a coupler residue having an acceptor property.

Abstract: A photoelectrographic element for electrostatic imaging, containing a conductive layer and a photosensitive layer, is produced using photosensitive layer materials which form a barrier to charge injection where exposed to ultraviolet radiation. As a result, exposed areas can be charged, while unexposed portions cannot. The photosensitive layer contains an organic photoconductor, an ultraviolet radiation sensitizer, and, optionally, an organic binder. A method of forming images with this photoelectrographic element is also disclosed.

Abstract: A photoconductor for electrophotography comprises an electroconductive substrate and a photosensitive layer formed on the substrate. The photosensitive layer includes a novel bisazo compound as a charge generating substance therein. The bisazo compound is represented by the following general formula: ##STR1## wherein, A stands for a coupler residue.

Abstract: A photoconductor for electrophotography comprises an electroconductive substrate and a photosensitive layer formed on the substrate. The photosensitive layer includes a novel bisazo compound as a charge generating substance therein.

Abstract: The invention provides a multiactive electrophotographic element comprising an electrically conductive substrate, a charge generation layer, and a charge transport layer, wherein the charge transport layer contains an electron transport agent having the structure: ##STR1## wherein J is H, Cl, Br, alkyl, alkoxy, aryl, or aryl further substituted with halo or alkyl; and wherein R is styryl, aryl, or heteroaryl in which the hetero atom is S or O, each of which R is unsubstituted or further substituted with alkyl, halo, alkoxy, nitro, hydroxy, cyano, trifluoromethyl, alkylsulfonyl, arylsulfonyl, alkoxycarbonyl, amino, alkylamino, dialkylamino, arylamino, or alkylarylamino.Such an element exhibits a good combination of electrophotographic performance properties.

Abstract: An enamine derivative containing a fluoroalkyl group, a fluoroaryl group or a fluoroaralkyl group is effective as a charge transport material in an electrophotographic member excellent in sensitivity, residual potential, durability and the like electrophotographic properties.

Abstract: An electrophotographic photoreceptors containing a bisstyryl compound represented by the following formula I is disclosed. ##STR1## R.sup.0 and/or R.sup.00 represent methyl group, and the rest of Rs represent hydrogen atom or an alkyl group having 1 to 4 carbon atoms; and Ar.sup.1 and Ar.sup.2 represent each an aromatic group.

Abstract: An electrophotographic photoconductor is composed of an electroconductive support and a photoconductive layer formed thereon comprising a novel pyrene-ring-containing olefin compound having formula [I]: ##STR1## wherein R.sup.1 and R.sup.2 each represent hydrogen or an alkyl group which may have a substituent; Y is an aliphatic hydrocarbon group which may have a substituent, a cyclic hydrocarbon group which may have a substituent, or an aromatic group which may have a substituent; n is an integer of 0 or 1, and m is an integer of 1 to 3, provided that when n is 0, m is 1, R.sup.1 is hydrogen, and Y is an aromatic group with a substituent ##STR2## R.sup.5 and R.sup.3 each represent hydrogen, and Y and R.sup.1 may be bonded to form a ring, a method of synthesizing the pyrene-ring-containing olefin compound and an intermediate therefor are disclosed.

Abstract: The present invention relates to an improvement of an electrophotographic sensitive member comprising an amorphous silicon photoconductive layer and an amorphous silicon carbide surface layer formed on said amorphous silicon photoconductive layer.An electrophotographic sensitive member with amorphous silicon as a photoconductive layer has been already practically used and a quantity thereof produced has been on the increase year by year. In this sensitive member, as a rule, in order to increase a surface hardness, a surface layer formed of amorphous silicon carbide has been formed.An electrophotographic sensitive member with such two layers as the fundamental layer structure improved in charge acceptance, residual electric potential, photosensitivy and the like by forming a carrier blocking layer containing boron, oxygen, nitrogen and the like in a quantity within a desired range between a substrate for use in a sensitive member and the amorphous silicon photoconductive layer has been provided.