Abstract: An organic light emitting device composed of: a first electrode; a second electrode; and a luminescent region including an organic electroluminescent material between the first electrode and the second electrode, wherein one of the first electrode and the second electrode includes both a substantially transparent charge injecting layer adjacent to the luminescent region and an electrically conductive light absorbing layer.

Abstract: Disclosed is a process for preparing a colorant of the formula wherein M is an atom or group of atoms capable of bonding to the central cavity of a phthalocyanine molecule, wherein axial ligands optionally can be attached to M, which comprises (a) reacting 3-n-pentadecylphenol with 4-nitrophthalonitrile in the presence of a base to form an alkylarylether adduct of phthalonitrile; and (b) reacting the alkylarylether adduct of phthalonitrile with either (i) a metal compound, or (ii) an ammonia-releasing compound in the presence of an alkanolamine solvent, or (iii) mixtures of (i) and (ii), to form the colorant.

Abstract: Disclosed are compounds of the formula wherein M is an atom or group of atoms capable of bonding to the central cavity of a phthalocyanine molecule, wherein axial ligands optionally can be attached to M.

Abstract: A process for the preparation of perylene mixtures comprised of at least two symmetrical perylene bisamide dimers of Formula 1 wherein R is hydrogen, alkyl, cycloalkyl, substituted alkyl, aryl, substituted aryl, aralkyl or substituted aralkyl, and at least one terminally unsymmetrical dimer of Formula 2 wherein R1 and R2 are hydrogen, alkyl, cycloalkyl, substituted alkyl, aryl, substituted aryl, aralkyl, or substituted aralkyl, and wherein R1 and R2 are dissimilar, which process comprises the condensation of a mixture of at least two perylene monoimide-monoanhydrides of Formula 3 with a diamine wherein R is hydrogen, alkyl, cycloalkyl, substituted alkyl, aryl, substituted aryl, aralkyl, and substituted aralkyl, with a 1,3-diaminopropane.

Abstract: A photoconductive imaging member comprised of an unsymmetrical perylene of the formula wherein each R1 and R2 are dissimilar and wherein the R1 and R2 are hydrogen, alkyl, cycloalkyl, substituted alkyl, aryl, substituted aryl, aralkyl, and substituted aralkyl, and X represents a symmetrical bridging component, and y represents the number of X components.

Abstract: A photoconductive imaging member containing a photogenerating layer and a triphenylamine charge transport layer of the formula or optionally mixtures thereof wherein R1, R2, R3, R4, and R5 are each independently alkyl, aryl, hydrogen, alkoxy, and the like.

Abstract: A photoconductive imaging member comprised of a mixture of at least two symmetrical perylene bisimide dimers of Formula 1 Formula 1 wherein R is hydrogen, alkyl, cycloalkyl, substituted alkyl, aryl, substituted aryl, aralkyl or substituted aralkyl, and at least one terminally unsymmetrical dimer of Formula 2 Formula 2 wherein R1 and R2 are hydrogen, alkyl, cycloalkyl, substituted alkyl, aryl, substituted aryl, aralkyl, or substituted aralkyl, and wherein R1 and R2 are dissimilar.

Abstract: A process including: treating a mixture comprising an aqueous dispersion of toner particles and a first solution of a water soluble alkyl carboxylate metal salt with a second solution of a water soluble metal salt.

Abstract: A photoconductive imaging member containing a photogenerator layer comprised of a mixture of bis(methylbenzimidazo)perinone, optionally an (alkylimido)perylene, such as (n-pentylimido)perylene or mixtures of (n-pentylimido)perylene, bisbenzimidazo(2,1-a-1′,2′-b)anthra(2,1,9-def:6,5,10-d′e′f′)diisoquinoline-6,11-dione and bisbenzimidazo(2,1-a:2′,1′-a)anthra(2,1,9-def:6,5,10-d′e′f′)diisoquinoline-10,21-dione, and a charge transport layer.

Abstract: A process including: treating a mixture comprising an aqueous dispersion of toner particles and a first solution of a water soluble alkyl carboxylate metal salt with a second solution of a water soluble metal salt.

Abstract: A mixture comprised of at least two perylenes and wherein the mixture includes symmetrical perylenes, unsymmetrical perylenes, and unsymmetrical perylenes with dissimilar R.sub.1 and R.sub.2 terminal substituents. The perylene mixtures can be selected for photoconductive imaging members.

Abstract: A photoconductive imaging member comprised of an unsymmetrical perylene of the formula ##STR1## wherein each R.sub.1 and R.sub.2 are dissimilar and wherein the R.sub.1 and R.sub.2 are hydrogen, alkyl, cycloalkyl, substituted alkyl, aryl, substituted aryl, aralkyl, and substituted aralkyl, and X represents a symmetrical bridging component, and y represents the number of X components.

Abstract: Photoconductive imaging members comprised of a mixture of dimeric perylenes as a charge generator, wherein said mixture comprises at least perylenes encompassed by the following formulas, or mixtures thereof ##STR1## wherein R is hydrogen, alkyl, cycloalkyl, oxaalkyl, substituted alkyl, aryl, substituted aryl, aralkyl or substituted aralkyl; and X is a symmetrical bridging moiety, and X--Y represents an unsymmetrical bridging moiety.

Abstract: A process for the preparation of perylene tetracarboxylic acid dianhydride comprising the dissolution thereof in an aqueous alkaline solution, or optionally an amine solution; converting the salt formed to the corresponding tetracarboxylic acid of said perylene tetracarboxylic dianhydride; heating the resulting tetracarboxylic acid; washing the dianhydride formed until the filtrate pH indicates substantially complete removal of the acid; and drying said dianhydride.

Abstract: Photoconductive imaging members comprised of unsymmetrical dimeric perylene as a charge generator, wherein said perylene is of the following formula ##STR1## wherein R is hydrogen, alkyl, cycloalkyl, substituted alkyl, aryl, substituted aryl, aralkyl or substituted aralkyl group, and X--Y is an unsymmetrical bridging moiety of alkylene, substituted alkylene, arylene, substituted arylene, aralkylene or substituted aralkylene.

Abstract: Photoconductive imaging members comprised of unsymmetrical dimeric perylene as a charge generator, wherein said perylene is of the following formula ##STR1## wherein R is hydrogen, alkyl, cycloalkyl, substituted alkyl, aryl, substituted aryl, aralkyl or substituted aralkyl group, and X-Y is an unsymmetrical bridging moiety of alkylene, substituted alkylene, arylene, substituted arylene, aralkylene or substituted aralkylene.

Abstract: Photoconductive imaging members comprised of a symmetrical dimeric perylene as a charge generator, wherein said perylene is of the following formulawherein R is hydrogen, alkyl, cycloalkyl, oxaalkyl, substituted alkyl, aryl, substituted aryl, aralkyl or substituted aralkyl, and X is the symmetrical bridging moiety, N--N, alkylene, when n is zero, substituted alkylene, cycloalkylene, arylene, substituted arylene, aralkylene, or substituted aralkylene.

Abstract: A process for the preparation of fluorescent toner compositions comprising(i) preparing a pigment dispersion in a solvent, which dispersion is comprised of a pigment or dye, an ionic surfactant and optionally a charge control agent;(ii) shearing the pigment dispersion with a latex mixture comprised of a counterionic surfactant with a charge polarity of opposite sign to that of said ionic surfactant, a nonionic surfactant and resin particles, thereby causing a flocculation or heterocoagulation of pigment, resin particles and charge control agent to form electrostatically bound toner size aggregates; and(iii) heating the statically bound aggregated particles to form said toner composition comprised of polymeric resin, pigment and optionally a charge control agent, and wherein the pigment or dye is excitable by ultraviolet light in the frequency range of from about 254 to about 366 nanometers and fluoresces in the visible spectrum of from about 400 to about 700 nanometers.

Abstract: A photoconductive imaging member comprised of a supporting substrate, a photogenerating layer, and a charge transport layer, and wherein said photogenerating layer is comprised of a tetrafluoro hydroxygallium phthalocyanine.

Abstract: A process for the preparation of hydroxygallium phthalocyanine which comprises hydrolysis of halogallium phthalocyanine precursor to a hydroxygallium phthalocyanine, and conversion of said resulting hydroxygallium phthalocyanine to Type V hydroxygallium phthalocyanine by contacting said resulting hydroxygallium phthalocyanine with an organic solvent; and wherein said precursor halogallium phthalocyanine is obtained by the reaction of gallium halide with diiminoisoindolene in an organic solvent.