Electrophotographic photoreceptor

An electrophotographic photoreceptor comprising at least a photosensitive layer and a protective layer sequentially on an electroconductive support, wherein

• the protective layer contains a compound represented by Formula (1) described below, and the compound represented by Formula (1) satisfies Formula (I) described below:
• in Formula (1), X represents an n-valent electron transport skeleton;
• A is a hydrogen atom, an alkyl group optionally having a substituent, an alkoxy group optionally having a substituent, an aryloxy group optionally having a substituent, a heteroaryloxy group optionally having a substituent, an alkoxycarbonyl group optionally having a substituent, a dialkylamino group optionally having a substituent, a diarylamino group optionally having a substituent, an arylalkylamino group optionally having a substituent, an acyl group optionally having a substituent, a haloalkyl group optionally having a substituent, an alkylthio group optionally having a substituent, an arylthio group optionally having a substituent, a silyl group optionally having a substituent, a siloxy group optionally having a substituent, an aromatic hydrocarbon group optionally having a substituent, an aromatic heterocyclic group optionally having a substituent, a group represented by Formula (2) described below, or a group represented by Formula (1B) described below;
• n represents an integer of 1 or more;
• when n is 1, A is a group represented by Formula (2) described below or a group represented by Formula (1B) described below;
• when n is 2 or more, a plurality of As may be the same or different, and at least one A is a group represented by Formula (2) described below or a group represented by Formula (1B) described below,
• in Formula (2), * represents a bond with X;
• R1 and R2 each independently represent a hydrogen atom, an alkyl group optionally having a substituent, an alkoxy group optionally having a substituent, an aryloxy group optionally having a substituent, a heteroaryloxy group optionally having a substituent, an alkoxycarbonyl group optionally having a substituent, a dialkylamino group optionally having a substituent, a diarylamino group optionally having a substituent, an arylalkylamino group optionally having a substituent, an acyl group optionally having a substituent, a haloalkyl group optionally having a substituent, an alkylthio group optionally having a substituent, an arylthio group optionally having a substituent, a silyl group optionally having a substituent, a siloxy group optionally having a substituent, an aromatic hydrocarbon group optionally having a substituent, an aromatic heterocyclic group optionally having a substituent, or a group represented by Formula (1B) described below;
• L1 and L2 each independently represent a direct bond, a divalent group, a group represented by Formula (1A) described below, or a group represented by Formula (3A) described below;
• and
• Z represents a hydrogen atom, an alkyl group, an alkoxy group, an amide group, or a polymerizable functional group,
• provided that x1+y1=3 wherein x1 is an integer from 0 to 2 and y1 is an integer from 1 to 3;
• x2+y2=3 wherein x2 is an integer from 0 to 2 and y2 is an integer from 1 to 3;
• when x1 is an integer of 2 or more, R1s may be the same or different;
• when y1 is an integer of 2 or more, each of R2s, x2s, y2s, L1s, L2s, and Zs may be the same or different;
• when x2 is an integer of 2 or more, R2s may be the same or different;
• and when y2 is an integer of 2 or more, each of Las and Zs may be the same or different,
• in Formula (1B), * represents a bond with any atom in Formula (1) or (2), and B1 and B2 each independently represent a direct bond or a divalent group;
• and R3 represents a hydrogen atom, an alkyl group optionally having a substituent, an alkoxy group optionally having a substituent, an aryloxy group optionally having a substituent, a heteroaryloxy group optionally having a substituent, an alkoxycarbonyl group optionally having a substituent, a dialkylamino group optionally having a substituent, a diarylamino group optionally having a substituent, an arylalkylamino group optionally having a substituent, an acyl group optionally having a substituent, a haloalkyl group optionally having a substituent, an alkylthio group optionally having a substituent, an arylthio group optionally having a substituent, a silyl group optionally having a substituent, a siloxy group optionally having a substituent, an aromatic hydrocarbon group optionally having a substituent, an aromatic heterocyclic group optionally having a substituent, or a polymerizable functional group,
• in Formula (1A) and Formula (3A), * represents a bond with any atom in Formula (1) and Formula (2);
• in Formula (1A), B1 and B2 each independently represent a direct bond or a divalent group;
• and in Formula (3A), n is an integer of 1 or more,
• M
• E
• ⁢
• T
• ⁢
• M
• ≥
• 700
• (
• I
• )
• in Formula (I), METM represents a molecular weight of the compound represented by Formula (1).