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

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),
• L1 and L2 each independently represent a divalent group,
• Ar1 and Ar2 each independently represent a divalent aromatic group having 6 to 30 carbon atoms or a divalent heteroaromatic group having 3 to 30 carbon atoms,
• E1 and E2 each independently represent a divalent group,
• P1 and P2 each independently represent a chain polymerizable functional group,
• R1 and R2 each independently represent 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, a halogen atom, a cyano group, an aromatic hydrocarbon group which may have one or more substituents or an aromatic heterocyclic group which may have one or more substituents,
• a1, a2, b1, b2, c1 and c2 each independently represent an integer of 1 or more,
• d1 and d2 each independently represent an integer of 0 or more and 6 or less, wherein d1+d2 is one or more, and n1 and n2 each independently represent an integer of 0 or more.

A compound represented by the following formula (1),

• in formula (1),
• L1 and L2 each independently represent a divalent group, Ar1 and Ar2 each independently represent a divalent aromatic group having 6 to 30 carbon atoms or a divalent heteroaromatic group having 3 to 30 carbon atoms,
• E1 and E2 each independently represent a divalent group,
• P1 and P2 each independently represent a chain polymerizable functional group,
• R1 and R2 each independently represent 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, a halogen atom, a cyano group, an aromatic hydrocarbon group which may have one or more substituents or an aromatic heterocyclic group which may have one or more substituents,
• a1, a2, b1, b2, c1 and c2 each independently represent an integer of 1 or more,
• d1 and d2 each independently represent an integer of 0 or more and 6 or less, wherein d1+d2 is one or more, and n1 and n2 each independently represent an integer of 0 or more.