Patent ID: 7169521

Claim:
An organophotoreceptor comprising an electrically conductive substrate and a photoconductive element on the electrically conductive substrate, the photoconductive element comprising: (a) charge transport material having the formula where R 1 and R 2 are, each independently, an alkyl group, an alkenyl group, an alkynyl group, an aromatic group, or a heterocyclic group; R 3 and R 4 are, each independently, H, an alkyl group, an alkenyl group, an alkynyl group, an aromatic group, or a heterocyclic group; X 1 and X 2 are, each independently, a linking group; Y 1 and Y 2 , each independently, comprise an arylamine group; and Z is a bridging group having the formula -Q 1 -X 3 -Q 2 - where Q 1 and Q 2 comprise, each independently, O, S, or NR where R is H, an alkyl group, an alkenyl group, an alkynyl group, a heterocyclic group, or an aromatic group; and X 3 comprises a —(CH 2 ) p — group where p is an integer between 1 and 20, inclusive, and at least one of the methylene groups is replaced by O, S, N, C, B, Si, P, C═O, O═S═O, an NR g group, a CR h group, a CR i R j group, or a SiR k R l where R g , R h , R i , R j , R k , and R l are, each independently, a bond, H, a hydroxyl group, a thiol group, a carboxyl group, an amino group, an alkyl group, an alkoxy group, an alkenyl group, an alkynyl group, a heterocyclic group, an aromatic group, or a part of a ring group; and (b) a charge generating compound.