Patent ID: 7501216

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 Y═N—N═X═N—N═Y′ where Y and Y′ comprise, each independently, a 9-fluorenylidene group and X is a conjugated linking group that allows the delocalization of pi electrons over at least Y and Y′, wherein X is selected from the group consisting of a 1,2-ethanediylidene group, a 1,4-phenylenedimethylidyne group, a 2,4-cyclohexadienylidene group, a 2,5-cyclohexadienylidene group, a bicyclohexylidene-2,5,2′,5′-tetraene group, a bicyclohexylidene-2,4,2′,4′-tetraene group, a combination thereof, and a (C 6 R 1 R 2 R 3 R 4 ) n group, where the C 6 group is a cyclohexadienylidene group with substituents R 1 R 2 R 3 R 4 ; n is an integer between 1 and 20, inclusive; and R 1 , R 2 , R 3 , and R 4 , each independently, are a hydrogen, a halogen, an amino group, a nitro group, a cyano group, an alkyl group, an alkenyl group, a heterocyclic group, an aromatic group, or part of a ring group; and (b) a charge generating compound.