Electrophotosensitive receptor with trisazo compound

Claim 1

An electrophotosensitive receptor comprising a conductive support and an electrophotosensitive layer thereon comprising a carrier transporting material and an azo compound selected from the formula A--N═N--Ar.sub.1 --N═N--Ar.sub.2 --N═N--A wherein Ar 1 and Ar 2 are individually selected from a divalent aromatic ring; and wherein A is selected from ##STR9## wherein X is selected from a hydroxy group, ##STR10## or --NHSO 2 --R 6 wherein R 4 and R 5 are individually selected from a hydrogen atom or an alkyl group, R 6 is selected from an alkyl group and an aryl group; Y is selected from a hydrogen atom, a halogen atom, an alkyl group, an alkoxy group, a carboxy group, a sulfo group, a carbamoyl group and a sulfamoyl group; Z is selected from at least one atomic group necessary for forming an aromatic ring; A' is selected from an aryl group; R 1 is selected from a hydrogen atom, an amino group, an alkyl group, a carbamoyl group, or a carboxy group and ester thereof; R 2 and R 3 are individually selected from an alkyl group, an aralkyl group and an aryl group; m is 0, 1 or 2; and n is 1 or 2, wherein each of the following groups: R 4 and R 5 -an alkyl group; R 6 -an alkyl group and an aryl group; Y-an alkyl group, an alkoxy group, a carboxy group, a sulfo group, a carbamoyl group, and a sulfamoyl group; Z-an aromatic ring; A'-an aryl group; R 1 -an amino group, an alkyl group, a carbamoyl group, and a carboxy group; R 2 and R 3 -an alkyl group, an aralkyl group, and an aryl group; may be substituted with at least one substituent selected from the group consisting of a halogen atom, a cyano group, a hydroxy group, an amino group, a nitro group, a carboxy group, an alkyl group, an aryl group, an alkoxy group, a acylamino group, a carbamoyl group, a sulfonamido group, and a sulfamoyl group, said azo compound being applied as a coating solution containing a solvent or as a liquid dispersion mixture containing a dispersion medium.