Patent ID: 7144665

Claim:
An organophotoreceptor comprising an electrically conductive substrate and a photoconductive element on the electrically conductive substrate, the photoconductive element comprising: (a) a charge transport material having the formula where R 1 , R 2 , R 3 , R 4 , R 5 , R 6 , R 7 , and R 8 are, each independently, an alkyl group, an alkaryl group, an aryl group, or heterocyclic group, X and X′ are, each independently, aromatic groups, and Z is a divalent linking group having the formula —(CH 2 ) m —, branched or linear, where m is an integer between 1 and 30, inclusive, one or more of the methylene groups may be replaced by O, S, C═O, O═S═O, a heterocyclic group, an aromatic group, urethane, urea, an ester group, a NR 9 group, a CHR 10 group, or a CR 11 R 12 group where R 9 and R 10 are, each independently, H, hydroxyl, thiol, an alkoxy group, an alkyl group, or an aryl group, and R 11 , and R 12 are, each independently, H, hydroxyl, thiol, an alkoxy group, an alkyl group, an aryl group, or a part of a cyclic ring and one or more methylene groups is replaced by S, C═O, O═S═O, a heterocyclic group, urethane, urea, an ester group, a NR 9 group a CHR 13 group, a CR 14 R 15 group where R 13 , R 14 and R 15 are independently hydroxyl, thiol, an alkoxy group or an alkyl group; and (b) a charge generating compound.