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1. An electrophotographic photosensitive member, comprising:
a support; an undercoat layer formed on the support; and a photosensitive layer formed on the undercoat layer, wherein the undercoat layer comprises
a structure represented by the following formula (C1), ora structure represented by the following formula (C2),wherein, in the formulae (C1) and (C2),
R11 to R16, and R22 to R25 each independently represent a hydrogen atom, a methylene group, a monovalent group represented by —CH2OR2, a group represented by the following formula (i), or a group represented by the following formula (ii), at least one of R11 to R16, and at least one of R22 to R25 are each the group represented by the formula (i), at least one of R11 to R16, and at least one of R22 to R25 are each the group represented by the formula (ii), R2 represents a hydrogen atom or an alkyl group having 1 to 10 carbon atoms, and R21 represents an alkyl group, a phenyl group, or a phenyl group substituted with an alkyl group,wherein, in the formula (i),
R61 represents a hydrogen atom or an alkyl group, Y1 represents a single bond, an alkylene group, or a phenylene group, D1 represents a divalent group represented by any one of the following formulae (D1) to (D4), and “*” in the formula (i) indicates the side to which a nitrogen atom in the formula (C1) or a nitrogen atom in the formula (C2) is bound,wherein, in the formula (ii),
D2 represents a divalent group represented by any one of the above formulae (D1) to (D4), α represents an alkylene group having 1 to 6 main-chain atoms, an alkylene group having 1 to 6 main-chain atoms and being substituted with an alkyl group having 1 to 6 carbon atoms, an alkylene group having 1 to 6 main-chain atoms and being substituted with a benzyl group, an alkylene group having 1 to 6 main-chain atoms and being substituted with an alkoxycarbonyl group, or an alkylene group having 1 to 6 main-chain atoms and being substituted with a phenyl group, one of the carbon atoms in the main chain of the alkylene group may be replaced with O, S, NH, or NR1, R1 representing an alkyl group having 1 to 6 carbon atoms, β represents a phenylene group, a phenylene group substituted with an alkyl group having 1 to 6 carbon atoms, a phenylene group substituted with a nitro group, or a phenylene group substituted with a halogen atom, γ represents an alkylene group having 1 to 6 main-chain atoms, or an alkyl group having 1 to 6 main-chain atoms and being substituted with an alkyl group having 1 to 6 carbon atoms, l, m, and n each independently represent 0 or 1, A1 represents a divalent group represented by any one of the following formulae (A1) to (A9), and “*” in the formula (ii) indicates the side to which a nitrogen atom in the formula (C1) or a nitrogen atom in the formula (C2) is bound,wherein, in the formulae (A1) to (A9),
R101 to R106, R201 to R210, R301 to R308, R401 to R408, R501 to R510, R601 to R606, R701 to R708, R801 to R810, and R901 to R908 each independently represent a single bond, a hydrogen atom, a halogen atom, a cyano group, a nitro group, an alkoxycarbonyl group, a carboxyl group, a dialkylamino group, a hydroxy group, an unsubstituted or substituted alkyl group, an unsubstituted or substituted aryl group, or an unsubstituted or substituted hetero ring, at least two of R101 to R106, at least two of R201 to R210, at least two of R301 to R308, at least two of R401 to R408 at least two of R501 to R510, at least two of R601 to R606, at least two of R701 to R708, at least two of R801 to R810, and at least two of R901 to R908 are the single bonds, a substituent of the substituted alkyl group is an alkyl group, an aryl group, a halogen atom, or a carbonyl group, a substituent of the substituted aryl group or hetero ring is a halogen atom, a nitro group, a cyano group, an alkyl group, a halogen-substituted alkyl group, an alkoxy group, or a carbonyl group, Z201, Z301, Z401, and Z501 each independently represent a carbon atom, a nitrogen atom, or an oxygen atom, R209 and R210 are absent when Z201 is the oxygen atom, R210 is absent when Z201 is the nitrogen atom, R307 and R308 are absent when Z301 is the oxygen atom, R308 is absent when Z301 is the nitrogen atom, R407 and R408 are absent when Z401 is the oxygen atom, R408 is absent when Z401 is the nitrogen atom, R509 and R510 are absent when Z501 is the oxygen atom, and R510 is absent when Z501 is the nitrogen atom. |
