Photosensitive colorant materials

Abstract

Colorant materials which exhibits useful levels of electrical photosensitivity are disclosed. These materials have the formula: ##STR1## wherein .[.n represents 0 or 1,.]. m represents 1 or 2, Ar represents an aromatic group, A represents an alkylene group, R 1 and R 2 , when taken together, represent an alkylene group, R 1 , R 4 , R 5 , and R 6 , when taken alone, each represent hydrogen, nitro, cyano, halogen, or one of various specified organo groups, and R 2 , when taken alone, represents hydrogen, an aromatic or an alkyl group.

I claim: 
     
       1. An electrically photosensitive colorant having the formula: ##STR25## wherein .[.n represents 0 or 1;.]. m represents the integer 1 or 2; Ar represents a substituted or unsubstituted aromatic ring group, free from any saturated N-heterocyclic ring group fused thereto, having 6 to 20 ring atoms in the aromatic ring;   A represents a substituted or unsubstituted alkylene group having 2 to 5 carbon atoms in the alkylene chain;   each of R 1  and R 2 , when taken together, represents a substituted or unsubstituted alkylene group having 2 to 5 carbon atoms in the alkylene chain;   each of R 1 , R 4 , R 5 , and R 6 , when taken alone, represents hydrogen, nitro, cyano, halogen, alkoxy having 1 to 8 carbon atoms, substituted or unsubstituted alkyl having 1 to 8 carbon atoms in the alkyl group, substituted or unsubstituted phenyl, carboxy ester having 1 to 4 carbon atoms, or an amide having the formula:   --CONR.sub.2.sup.7     wherein     R 7  represents hydrogen or substituted or unsubstituted phenyl or substituted or unsubstituted alkyl having 1 to 8 carbon atoms in alkyl group; and   R 2 , when taken alone, represents hydrogen, substituted or unsubstituted alkyl having 1 to 8 carbon atoms in the alkyl group, or substituted or unsubstituted aromatic ring group havng 6 to 20 carbon ring atoms.   
     
     
       2. An electrically photosensitive colorant component having the following formula: ##STR26## wherein Ar represents a substituted or unsubstituted, aromatic ring group having 6 to 20 ring atoms in the aromatic ring; each of R 4  and R 5 , which may be the same or different, represents hydrogen or cyano; and   R 2  represents a substituted or unsubstituted alkyl group having 1 to 8 carbon atoms in the alkyl group or a substituted or unsubstituted phenyl group.   
     
     
       3. An electrically photosensitive colorant component having the following formula: ##STR27## wherein Ar represents a substituted or unsubstituted, aromatic ring group having 6 to 20 ring atoms in the aromatic ring; and each of R 4  and R 5 , which may be the same or different, represents hydrogen or cyano.   
     
     
       4. An electrically photosensitive colorant having one of the following formulas: ##STR28##