Abstract: An azo compound having the following formula (I): A(E)n??(I) wherein A represents a residue of an azo compound, bonded with n pieces of E group through one or more heteroatom being N or O and forming a part of the residue A; E independently represents a hydrogen atom or —C(?O)—O—R1 wherein R1 represents a substituted or an unsubstituted alkyl group having 4 to 10 carbon atoms, an alkenyl group, an alkynyl group, a cycloalkyl group, a cycloalkenyl group or an aralkyl group; and n represents an integer of from 1 to 10.

Abstract: An azo compound having the following formula (I): A(E)n??(I) wherein A represents a residue of an azo compound, bonded with n pieces of E group through one or more heteroatom being N or O and forming a part of the residue A; E independently represents a hydrogen atom or —C(?O)—O—R1 wherein R1 represents a substituted or an unsubstituted alkyl group having 4 to 10 carbon atoms, an alkenyl group, an alkynyl group, a cycloalkyl group, a cycloalkenyl group or an aralkyl group; and n represents an integer of from 1 to 10.

Abstract: An azo compound having the following formula (I): A(E)n??(I) wherein A represents a residue of an azo compound, bonded with n pieces of E group through one or more heteroatom being N or O and forming a part of the residue A; E independently represents a hydrogen atom or —C(?O)—O—R1 wherein R1 represents a substituted or an unsubstituted alkyl group having 4 to 10 carbon atoms, an alkenyl group, an alkynyl group, a cycloalkyl group, a cycloalkenyl group or an aralkyl group; and n represents an integer of from 1 to 10.

Abstract: An azo compound having the following formula (I): A(E)n ??(I) wherein A represents a residue of an azo compound, bonded with n pieces of E group through one or more heteroatom being N or O and forming a part of the residue A; E independently represents a hydrogen atom or —C(?O)—O—R1 wherein R1 represents a substituted or an unsubstituted alkyl group having 4 to 10 carbon atoms, an alkenyl group, an alkynyl group, a cycloalkyl group, a cycloalkenyl group or an aralkyl group; and n represents an integer of from 1 to 10.

Abstract: An electrophotographic photoconductor includes an electroconductive support and a photoconductive layer formed thereon which contains a compound having a charge generating moiety and a charge transporting moiety in the molecule thereof. As such a compound for use in the electrophotographic photoconductor, various compounds having a charge generating moiety derived from an azo compound and a charge transporting moiety derived from a triarylamine compound are proposed. Bisazo and trisazo compounds serving as such compounds are also proposed, together with intermediates for producing the bisazo and trisazo compounds.

Abstract: A polyazo compound capable of effectively absorbing near-infrared rays, which can be produced from readily available raw materials is provided, which comprises at least one --OH group or at least one group derived from --OH group at p-position of the azo group in the molecule of the polyazo compound. This compound can be produced by diazotizing a substituted or nonsubstituted aromatic monocyclic or polycyclic compound or heterocyclic compound, each having a diazotizable primary amino group, and successively coupling the resulting diazo component with an azo component having a diazotizable primary amino group, the last azo component being such that --OH group or a group derived from --OH group be present at p-position to the azo group resulting from the azo component.

Abstract: The invention provides novel bisazo compounds which is obtained by coupling two molecules of a 2-hydroxynaphthalene-3,6-dicarboxylic acid derivative and a compound having two diazo groups in its molecule, as well as a process for producing the same. The present compounds are superior in resistance to water, chemical agents, solvents, heat and the like.

Abstract: Bisazo compounds useful as charge generating materials having formula (I) are disclosed: ##STR1## wherein R represents hydrogen, an alkyl group having 1 to 4 carbon atoms, an alkoxyl group having 1 to 4 carbon atoms or a nitro group.

Abstract: Bisazo compounds, useful as organic photoconductive materials, having formula (I) or (II) are disclosed: ##STR1## wherein R represents hydrogen, an alkyl group having 1 to 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms or a nitro group; ##STR2## wherein A and B independently represent hydrogen or chloride provided that either A or B represents chloride.

Abstract: A process for the preparation of photogenerating pigments which comprises the reaction of a diaminofluorenone with an alkali nitrite, an acid, and a tetrafluoroborate; thereafter reacting the resulting product with an anilide coupler; and subsequently annealing the product obtained.

Abstract: Malonic acid dyes capable of forming polycondensation products have the formula ##STR1## where R.sup.1 and R.sup.2 are each independently of the other hydroxyl, C.sub.1 -C.sub.6 -alkoxy, chlorine or bromine,R.sup.3 is hydrogen or C.sub.1 -C.sub.6 -alkyl,A is C.sub.1 -C.sub.20 -alkylene which may be interrupted by oxygen atoms or by imino or C.sub.1 -C.sub.4 -alkylimino groups, andChr is the radical of a chromophore derived from an anthraquinone, perylene, disazo or trisazo dye or else, when R.sup.3 is C.sub.1 -C.sub.6 -alkyl, from a monoazo dye.

Abstract: An electrophotographic photoreceptor having on a conductive support a photoconductive layer containing a specific azo compound is disclosed.

Abstract: A bisazo compound having good electrophotographic properties is disclosed, which is represented by formula (I) ##STR1## wherein X represents a hydrogen atom, a chlorine atom or a nitro group. A process for producing the bisazo compound is also disclosed.

Abstract: Photoconductive imaging members comprising a supporting substrate, a hole transport layer, and a photogenerating layer comprising disazo compounds selected from the group consisting of: ##STR1## wherein X is selected from the group consisting of: ##STR2## wherein Y is selected from the group consisting of: ##STR3## The photoconductive imaging members possess high cyclic stability, high photosensitivity, good dark development potential, low dark decay values, and excellent panchromaticity. They are non-toxic and may be made inexpensively, which renders them disposable.

Abstract: Bisazo compounds represented by the general formula ##STR1## wherein R represents a halogen selected from the group consisting of fluorine, chlorine, bromine and iodine, and when R is fluorine, it is at the ortho, para or meta position in each phenylcarbamoyl group; when R is chlorine, it is at the ortho position; when R is bromine, it is positioned at the ortho or meta position; and when R is iodine, it is at the meta position, which bisazo compounds are particularly suitable for use in the charge generating layer of a layered electrophotographic photoconductor.

Abstract: A dichromatic coloring matter for a colored liquid crystal display element comprising a compound of the general formula: ##STR1## where A and B each stand for ##STR2## where n is 0, 1, 2, 3 or 4, and X and Y each stand for ##STR3## where R.sub.1 and R.sub.2 stand for an alkyl group or hydrogen, --R (alkyl group) or --OR (alkoxy group).