Patent ID: 6773856
Filing Date: 2004-08-10
Classification: G03G

Abstract:
An electrophotographic photosensitive member comprising a support and a photosensitive layer provided thereon, wherein said photosensitive layer contains 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 independentlyrepresent â€”CH&boxH;Nâ€”, â€”CH&boxH;CHâ€”, â€”N&boxH;Nâ€” or â€”N(O)&boxH;Nâ€”, 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 â€”N&boxH;Nâ€” and all the Ar1 to Ar4 are the same is excluded; wherein Y1 to Y5 each independentlyrepresent â€”CH&boxH;Nâ€”, â€”CH&boxH;CHâ€”, â€”N&boxH;Nâ€” or â€”N(O)&boxH;Nâ€”, 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 â€”N&boxH;Nâ€” and all the Ar1 to Ar5 are the same is excluded; wherein Y1 to Y6 each independentlyrepresent â€”CH&boxH;Nâ€”, â€”CH&boxH;CHâ€”, â€”N&boxH;Nâ€” or â€”N(O)&boxH;Nâ€”, 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 â€”N&boxH;Nâ€” and all the Ar1 to Ar6 are the same is excluded; wherein Y1 to Y7 each independentlyrepresent â€”CH&boxH;Nâ€”, â€”CH&boxH;CHâ€”, â€”N&boxH;Nâ€” or â€”N(O)&boxH;Nâ€”, 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 â€”N&boxH;Nâ€” and all the Ar1 to Ar7 are the same is excluded; and wherein Y1 to Y8 each independentlyrepresent â€”CH&boxH;Nâ€”, â€”CH&boxH;CHâ€”, â€”N&boxH;Nâ€” or â€”N(O)&boxH;Nâ€”, 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 â€”N&boxH;Nâ€” and all the Ar1 to Ar8 are the same is excluded.