Sulfonyldiphenylene-based charge transport compositions

An electrophotographic imaging apparatus comprising:

• (a) a plurality of support rollers;
• and
• (b) an organophotoreceptor operably coupled to said support rollers with motion of said support rollers resulting in motion of said organophotoreceptor, said organophotoreceptor comprising:
• (i) a charge transport composition comprising molecules having the formula
• 21
• where the average n is between 1 and 1000;
• R1, R2, R3, and R4 are, independently, hydrogen, a branched or linear alkyl group, a branched or linear unsaturated hydrocarbon group, an ether group, a cycloalkyl group, or an aryl group;
• X is a divalent carbazole group or a divalent biscarbazole alkane group;
• Y is a divalent sulfonyldiphenylene group;
• Z is C(R4)—X—C(R3)═O double-bonded to the adjacent N or two hydrogens where each hydrogen is independently single-bonded to the adjacent N;
• and
• Q is O or N—N(R1)—Y—N(R2)—NH2;
• (ii) a charge generating compound;
• and
• (iii) an electrically conductive substrate over which the charge transport composition and the charge generating compound are located.

An electrophotographic imaging process comprising:

• (a) applying an electrical charge to a surface of an organophotoreceptor comprising:
• (i) a charge transport composition comprising molecules having the formula
• 22
• where the average n is between 1 and 1000;
• R1, R2, R3, and R4 are, independently, hydrogen, a branched or linear alkyl group, a branched or linear unsaturated hydrocarbon group, an ether group, a cycloalkyl group, or an aryl group;
• X is a divalent carbazole group or a divalent biscarbazole alkane group;
• Y is a divalent sulfonyldiphenylene group;
• Z is C(R4)—X—C(R3)═O double-bonded to the adjacent N or two hydrogens where each hydrogen is independently single-bonded to the adjacent N;
• and
• Q is O or N—N(R1)—Y—N(R2)—NH2;
• (ii) a charge generating compound;
• and
• (iii) an electrically conductive substrate over which the charge transport composition and the charge generating compound are located;
• (b) imagewise exposing said surface of said organophotoreceptor to radiation to dissipate charge in selected areas and thereby form a pattern of charged and uncharged areas on said surface;
• (c) contacting said surface with a toner to create a toned image;
• and
• (d) transferring said toned image to a substrate.

A charge transport composition comprising molecules having the formula

• 23
• where the average n is between 1 and 1000;
• R1, R2, R3, and R4 are, independently, hydrogen, a branched or linear alkyl group, a branched or linear unsaturated hydrocarbon group, an ether group, a cycloalkyl group, or an aryl group;
• X is a divalent carbazole group or a divalent biscarbazole alkane group;
• Y is a divalent sulfonyldiphenylene group;
• Z is C(R4)—X—C(R3)═O double-bonded to the adjacent N or two hydrogens where each hydrogen is independently single-bonded to the adjacent N;
• and
• Q is O or N—N(R1)—Y—N(R2)—NH2.