Electrophotographic photoreceptor, electrophotographic photoreceptor cartridge, image formation device, coating liquid for forming electrophotographic photoreceptor protective layer, and compound

A coating liquid for forming an electrophotographic photoreceptor protective layer comprising an electron-transporting compound represented by the following formula (1) and a solvent,

• in formula (1),
• X represents an electron-transporting skeleton,
• R1 and R2 each independently represent a hydrogen atom, an alkyl group which may have one or more substituents, an alkoxy group which may have one or more substituents, an aryloxy group which may have one or more substituents, a heteroaryloxy group which may have one or more substituents, an alkoxycarbonyl group which may have one or more substituents, a dialkylamino group which may have one or more substituents, a diarylamino group which may have one or more substituents, an arylalkylamino group which may have one or more substituents, an acyl group which may have one or more substituents, a haloalkyl group which may have one or more substituents, an alkylthio group which may have one or more substituents, an arylthiol group which may have one or more substituents, a silyl group which may have one or more substituents, a siloxy group which may have one or more substituents, an aromatic hydrocarbon group which may have one or more substituents or an aromatic heterocyclic group which may have one or more substituents, L1 represents a divalent group,
• Z1 represents an amide group (—NHCO—R′), an acrylamide group, a methacrylamide group, an acryloyl group or a methacryloyl group, wherein when a is 1, Z1 represents an amide group, an acrylamide group or a methacrylamide group, when a is an integer of 2 or more, at least one Z1 represents an amide group, an acrylamide group or a methacrylamide group, and R′ represents a hydrogen atom, an alkyl group which may have one or more substituents, an aralkyl group which may have one or more substituents or an aromatic group which may have one or more substituents, and
• A represents an integer of 1 or more, wherein when a is an integer of 2 or more, R1, R2, L1 and Z1 in each of the repeating structures may be the same or different from each other.

A compound represented by the following formula (1),

• in formula (1),
• X represents an electron-transporting skeleton,
• R1 and R2 each independently represent a hydrogen atom, an alkyl group which may have one or more substituents, an alkoxy group which may have one or more substituents, an aryloxy group which may have one or more substituents, a heteroaryloxy group which may have one or more substituents, an alkoxycarbonyl group which may have one or more substituents, a dialkylamino group which may have one or more substituents, a diarylamino group which may have one or more substituents, an arylalkylamino group which may have one or more substituents, an acyl group which may have one or more substituents, a haloalkyl group which may have one or more substituents, an alkylthio group which may have one or more substituents, an arylthio group which may have one or more substituents, a silyl group which may have one or more substituents, a siloxy group which may have one or more substituents, an aromatic hydrocarbon group which may have one or more substituents or an aromatic heterocyclic group which may have one or more substituents, wherein at least one of R1 and R2 is an alkyl group which has two or more carbon atoms and which may have one or more substituents,
• L1 represents a divalent group,
• Z1 represents an amide group (—NHCO—R′), an acrylamide group, a methacrylamide group, an acryloyl group or a methacryloyl group, wherein when a is 1, Z1 represents an amide group, an acrylamide group or a methacrylamide group, when a is an integer of 2 or more, at least one Z1 represents an amide group, an acrylamide group or a methacrylamide group, and R′ represents a hydrogen atom, an alkyl group which may have one or more substituents, an aralkyl group which may have one or more substituents or an aromatic group which may have one or more substituents, and
• a represents an integer of 1 or more, wherein when a is an integer of 2 or more, R1, R2, L1 and Z1 in each of repeating structures may be the same or different from each other.