Electrophotographic photosensitive member, process cartridge, and electrophotographic apparatus

A process cartridge which integrally supports an electrophotographic photosensitive member and at least one means selected from the group consisting of a charging means, a developing means, a transfer means and a cleaning means, and is detachably mountable to the main body of an electrophotographic apparatus, wherein;

• said electrophotographic photosensitive member is an electrophotographic photosensitive member comprising a support and a photosensitive layer provided thereon;
• said photosensitive layer containing a carixarene compound having structure represented by any one formula selected from the group consisting of the following formulas (1) to (5):
• wherein Y1 to Y4 each independently
• represent —CH═N—, —CH═CH—, —N═N— or —N(O)═N—, and Ar1 to Ar4 each independently represent a substituted or unsubstituted aromatic hydrocarbon ring or a substituted or unsubstituted aromatic heterocyclic ring, provided that a case in which all the Y1 to Y4 are —N═N— and all the Ar1 to Ar4 are the same is excluded;
• wherein Y1 to Y5 each independently
• represent —CH═N—, —CH═CH—, —N═N— or —N(O)═N—, and Ar1 to Ar5 each independently represent a substituted or unsubstituted aromatic hydrocarbon ring or a substituted or unsubstituted aromatic heterocyclic ring, provided that a case in which all the Y1 to Y5 are —N═N— and all the Ar1 to Ar5 are the same is excluded;
• wherein Y1 to Y6 each independently
• represent —CH═N—, —CH═CH—, —N═N— or —N(O)═N—, and Ar1 to Ar6 each independently represent a substituted or unsubstituted aromatic hydrocarbon ring or a substituted or unsubstituted aromatic heterocyclic ring, provided that a case in which all the Y1 to Y6 are —N═N— and all the Ar1 to Ar6 are the same is excluded;
• wherein Y1 to Y7 each independently
• represent —CH═N—, —CH═CH—, —N═N— or —N(O)═N—, and Ar1 to Ar7 each independently represent a substituted or unsubstituted aromatic hydrocarbon ring or a substituted or unsubstituted aromatic heterocyclic ring, provided that a case in which all the Y1 to Y7 are —N═N— and all the Ar1 to Ar7 are the same is excluded;
• and
• wherein Y1 to Y8 each independently
• represent —CH═N—, —CH═CH—, —N═N— or —N(O)═N—, and Ar1 to Ar8 each independently represent a substituted or unsubstituted aromatic hydrocarbon ring or a substituted or unsubstituted aromatic heterocyclic ring, provided that a case in which all the Y1 to Y8 are —N═N— and all the Ar1 to Ar8 are the same is excluded.

An electrophotographic apparatus comprising an electrophotographic photosensitive member, a charging means, an exposure means, a developing means and a transfer means, wherein;

• said electrophotographic photosensitive member is an electrophotographic photosensitive member comprising a support and a photosensitive layer provided thereon;
• said photosensitive layer containing a carixarene compound having structure represented by any one formula selected from the group consisting of the following formulas (1) to (5).
• wherein Y1 to Y4 each independently
• represent —CH═N—, —CH═CH—, —N═N— or —N(O)═N—, and Ar1 to Ar4 each independently represent a substituted or unsubstituted aromatic hydrocarbon ring or a substituted or unsubstituted aromatic heterocyclic ring, provided that a case in which all the Y1 to Y4 are —N═N— and all the Ar1 to Ar4 are the same is excluded;
• wherein Y1 to Y5 each independently
• represent —CH═N—, —CH═CH—, —N═N— or —N(O)═N—, and Ar1 to Ar5 each independently represent a substituted or unsubstituted aromatic hydrocarbon ring or a substituted or unsubstituted aromatic heterocyclic ring, provided that a case in which all the Y1 to Y5 are —N═N— and all the Ar1 to Ar5 are the same is excluded;
• wherein Y1 to Y6 each independently
• represent —CH═N—, —CH═CH—, —N═N— or —N(O)═N—, and Ar1 to Ar6 each independently represent a substituted or unsubstituted aromatic hydrocarbon ring or a substituted or unsubstituted aromatic heterocyclic ring, provided that a case in which all the Y1 to Y6 are —N═N— and all the Ar1 to Ar6 are the same is excluded;
• wherein Y1 to Y7 each independently
• represent —CH═N—, —CH═CH—, —N═N— or —N(O)═N—, and Ar1 to Ar7 each independently represent a substituted or unsubstituted aromatic hydrocarbon ring or a substituted or unsubstituted aromatic heterocyclic ring, provided that a case in which all the Y1 to Y7 are —N═N— and all the Ar1 to Ar7 are the same is excluded;
• and
• wherein Y1 to Y8 each independently
• represent —CH═N—, —CH═CH—, —N═N— or —N(O)═N—, and Ar1 to Ar8 each independently represent a substituted or unsubstituted aromatic hydrocarbon ring or a substituted or unsubstituted aromatic heterocyclic ring, provided that a case in which all the Y1 to Y8 are —N═N— and all the Ar1 to Ar8 are the same is excluded.