摘要:
An electrophotographic photosensitive member has a photosensitive layer provided on an electroconductive support. The photosensitive layer contains an azo pigment represented by the general formula (I): ##STR1## wherein Ar.sub.1 and Ar.sub.2 are respectively a divalent aromatic hydrocarbon group or a divalent heterocyclic group which may be the same or different and may have a substituent, and A.sub.1 and A.sub.2 are respectively a coupler residue having a phenolic hydroxyl group which may be the same or different.
摘要:
An electrophotographic photosensitive member comprising: a conductive substrate and a photosensitive layer on the conductive substrate, said photosensitive layer containing an azo pigment of the following formula (1):CP.sub.1 --N.dbd.N--Ar.sub.1 --(N.dbd.N--Ar.sub.2)--N.dbd.N--Cp.sub.2. . . (1)wherein Ar.sub.1 and Ar.sub.2 are each a substituted or unsubstituted aromatic cyclic group optionally bonded through a bonding group or a substituted or unsubstituted heterocyclic group optionally bonded through a bonding group, and cp.sub.1 and cp.sub.2 are each a group having the following formula (2), (3), (4) or (5): ##STR1## wherein R.sub.1 and R.sub.2 are each a hydrogen atom, a halogen atom, a nitro group, a cyano group, a trifluoromethyl group, a substituted or unsubstituted alkyl group, a substituted or unsubstituted alkoxy group, a substituted or unsubstituted aralkyl group, a substituted or unsubstituted allyl group, a substituted or unsubstituted heterocyclic group, or a substituted or unsubstituted amino group; R.sub.3, R.sub.4, R.sub.5 and R.sub.6 are each a hydrogen atom or a halogen atom, with the proviso that R.sub.3, R.sub.4 and R.sub.5 and R.sub.6 are not all simultaneously hydrogen atoms, and R3, R4, R5 and R6, respectively, may form a condensed ring together with part of the carbazole ring; R.sub.7 is a nitro group; R.sub.8 is a halogen atom, a nitro group, a cyano group, a trifluoromethyl group, a substituted or unsubstituted aralkyl group, a substituted or unsubstituted allyl group, a substituted or unsubstituted heterocyclic group, or a substituted or unsubstituted amino group, R.sub.9 is a chlorine atom or bromine atom; and X is an oxygen atom or a sulfur atom; with the proviso that when n is 1, cp.sub.1 and cp.sub.2 have the formula (2), (3), or (4), and when n is 2 or 3, cp.sub.1 and cp.sub.2 have the formula (2) or (5).
摘要:
An electrophotographic photosensitive member comprises an electroconductor support and a photosensitive layer formed thereon. The photosensitive layer contains at least one of the azo pigments represented by the formula [1], [2], or [3] below: ##STR1##
摘要:
An electrophotographic photosensitive member comprises a conductive support and a photosensitive layer provided thereon, wherein said photosensitive layer contains at least one of the compounds of the following Formula (I) and (II). ##STR1## wherein Y represents an oxygen atom or a sulfur atom; R.sub.1 represents a substituted or unsubstituted aromatic hydrocarbon group or aromatic heterocyclic group which may be bonded through a bonding group; R.sub.2 and R.sub.3 each represent a hydrogen atom, a substituted or unsubstituted alkyl group or aryl group; m is an integer of 1, 2 or 3; n.sub.2 is an integer of 1, 2 or 3; R.sub.4 represents a hydrogen atom, an alkyl group or a substituted or unsubstituted phenyl group; and n.sub.2 is an integer of 1, 2 or 3.
摘要:
An electrophotographic photosensitive member has a photosensitive layer on an electroconductive support. The photosensitive layer comprises a compound having a structure represented by the general formula (1) or (2) as a charge-generating material: ##STR1## wherein A.sub.1 and A.sub.3 are respectively an alkyl radical, an aralkyl radical, an aromatic radical or a heterocyclic radical which may have a substituent; A.sub.2 is hydrogen atom, or an alkyl radical, an aralkyl radical, an aromatic radical, or a heterocyclic radical which may have a substituent; A.sub.1 and A.sub.2 may be the same with or different from each other; A.sub.1 and A.sub.2 may be linked together to form a ring; and n is an integer of 1, 2, or 3.
摘要:
An electrophotographic photosensitive member comprises an electroconductive support and a photosensitive layer laid on the electroconductive support, the photosensitive layer containing a compound represented by the following general formula (1): ##STR1## wherein R in a substituted or unsubstituted aromatic group or heterocyclic group; X is substituted or unsubstituted benzenediyl, 2,3-pyridinediyl, 3,4-pyridinediyl or 2,3-pyrazinediyl; Y is an oxygen atom, a sulfur atom or a dicyanomethylene group, Z is an oxygen atom, a sulfur atom, a dicyanomethylene group or ##STR2## m is an integer of 1 2 or 3; and n is an integer of 0 or 1.