Organophotoreceptors for electrophotography featuring novel charge transport compounds based upon hydroxy-functional compounds

An electrophotographic imaging apparatus comprising:

• (a) a plurality of support rollers;
• and
• (b) an organic photoreceptor in the form of a flexible belt supported by said support rollers,
• said organic photoreceptor comprising:
• (i) a first charge transport compound having the formula:
• where X is an N-alkyl-substituted carbazole, an N-aryl-substituted carbazole, or a p-(N,N-disubstituted)arylamine;
• Ar is a group having the formula:
• R1 is a hydrogen, halogen, or alkyl group;
• R is a hydrogen, halogen, OH, CN, OR2, or OCOR3 group;
• R2 is an alkyl, aryl, or alkaryl group;
• R3 is a hydrogen, alkyl, aryl, or haloalkyl group;
• n is 0 or 1;
• A is a group having the formula:
• Z is O or S;
• Q is O, S, or CH2;
• and
• m is 0 or 1;
• (ii) a charge generating compound;
• and
• (iii) an electroconductive substrate.

An electrophotographic imaging process comprising:

• (a) applying an electrical charge to a surface of an organic photoreceptor comprising:
• (i) a first charge transport compound having the formula:
• where X is an N-alkyl-substituted carbazole, an N-aryl-substituted carbazole, or a p-(N,N-disubstituted)arylamine;
• Ar is a group having the formula:
• R1 is a hydrogen, halogen, or alkyl group;
• R is a hydrogen, halogen, OH, CN, OR2, or OCOR3 group;
• R2 is an alkyl, aryl, or alkaryl group;
• R3 is a hydrogen, alkyl, aryl, or haloalkyl group;
• n is 0 or 1;
• and
• A is a group having the formula:
• Z is O or S;
• Q is O, S, or CH2;
• and
• m is 0 or 1;
• (ii) a charge generating compound;
• and
• (iii) an electroconductive substrate;
• (b) imagewise exposing said surface of said organic photoreceptor to radiation to dissipate charge in selected areas and thereby form a pattern of charged and discharged areas on said surface;
• (c) contacting said surface with a liquid toner comprising a dispersion of colorant particles in an organic liquid to create a toned image;
• and
• (d) transferring said toned image to a substrate.

An organic photoreceptor comprising:

• (a) the reaction product of a reaction mixture comprising a multi-functional isocyanate and a charge transport compound having the formula:
• where X is an N-alkyl-substituted carbazole, an N-aryl-substituted carbazole, or a p-(N,N-disubstituted)arylamine;
• Ar is a group having the formula:
• R1 is a hydrogen, halogen, or alkyl group;
• R is a hydroxy group;
• R2 is an alkyl, aryl, or alkaryl group;
• R3 is a hydrogen, alkyl, aryl, or haloalkyl group;
• n is 0 or 1;
• A is a group having the formula:
• Z is O or S;
• Q is O, S, or CH2;
• and
• m is 0 or 1;
• (b) a charge generating compound;
• and
• (c) an electroconductive substrate.

An electrophotographic imaging apparatus comprising:

• (a) a plurality of support rollers;
• and
• (b) an organic photoreceptor in the form of a flexible belt supported by said support rollers,
• said organic photoreceptor comprising
• (i) the reaction product of a reaction mixture comprising a multi-functional isocyanate and a charge transport compound having the formula:
• where X is an N-alkyl-substituted carbazole, an N-aryl-substituted carbazole, or a p-(N,N-disubstituted)arylamine;
• Ar is a group having the formula:
• R1 is a hydrogen, halogen, or alkyl group;
• R is a hydroxy group;
• R2 is an alkyl, aryl, or alkaryl group;
• R3 is a hydrogen, alkyl, aryl, or haloalkyl group;
• n is 0 or 1;
• A is a group having the formula:
• Z is O or S;
• Q is O, S, or CH2;
• and
• m is 0 or 1;
• (ii) a charge generating compound;
• and
• (iii) an electroconductive substrate.

An electrophotographic imaging process comprising:

• (a) applying an electrical charge to a surface of an organic photoreceptor comprising:
• (i) the reaction product of a reaction mixture comprising a multi-functional isocyanate and a charge transport compound having the formula:
• where X is an N-alkyl-substituted carbazole, an N-aryl-substituted carbazole, or a p-(N,N-disubstituted)arylamine;
• Ar is a group having the formula:
• R1 is a hydrogen, halogen, or alkyl group;
• R is a hydroxy group;
• R2 is an alkyl, aryl, or alkaryl group;
• R3 is a hydrogen, alkyl, aryl, or haloalkyl group;
• n is 0 or 1;
• A is a group having the formula:
• Z is O or S;
• Q is O, S, or CH2;
• and
• m is 0 or 1;
• (ii) a charge generating compound;
• and
• (iii) an electroconductive substrate;
• (b) imagewise exposing said surface of said organic photoreceptor to radiation to dissipate charge in selected areas and thereby form a pattern of charged and discharged areas on said surface;
• (c) contacting said surface with a liquid toner comprising a dispersion of colorant particles in an organic liquid to create a toned image;
• and
• (d) transferring said toned image to a substrate.