Organic photoconductive material electrophotographic photoreceptor and image forming apparatus using the same

An electrophotographic photoreceptor comprising:

• a conductive substrate consisting of a conductive material;
• and a photosensitive layer containing a charge generation material and a charge transport material and provided on the conductive substrate, characterized in that the charge transport material contains an organic photoconductive material represented by the following general formula (1):
• where n is an integer ranging from 0 to 3;
• Ar1 and Ar2 each represent an aryl group optionally containing a substituent or a heterocyclic group optionally containing a substituent;
• Ar3 represents a phenylene group optionally containing a substituent and Ar6 represents a naphthylene group optionally containing a substituent;
• A4 and Ar5 represent one selected from a hydrogen atom, aryl groups optionally containing a substituent, heterocyclic groups optionally containing a substituent, aralkyl groups optionally containing a substituent and alkyl groups optionally containing a substituent, and both Ar4 and Ar5 are not, at the same time, hydrogen atoms, Ar4 and Ar5 may be bonded to each other via an atom or an atomic group, forming a cyclic structure;
• R1 represents a hydrogen atom, a halogen atom or an alkyl group optionally containing a substituent;
• and R2, R3 and R4 are selected from a hydrogen atom, alkyl groups optionally containing a substituent, aryl groups optionally containing a substituent, heterocyclic groups optionally containing a substituent and aralkyl groups optionally containing a substituent, and when n is 0, Ar3 represents a heterocyclic group optionally containing a substituent.

An image forming apparatus including an electrophotographic photoreceptor which comprises:

• a conductive substrate consisting of a conductive material;
• and a photosensitive layer containing a charge generation material and a charge transport material and provided on the conductive substrate, characterized in that the charge transport material contains an organic photoconductive material represented by the following general formula (1):
• where n is an integer ranging from 0 to 3;
• Ar1 and Ar2 each represent an aryl group optionally containing a substituent or a heterocyclic group optionally containing a substituent;
• Ar3 represents a phenylene group optionally containing a substituent and Ar6 represents a naphthylene group optionally containing a substituent;
• A4 and Ar5 represent one selected from a hydrogen atom, aryl groups optionally containing a substituent, heterocyclic groups optionally containing a substituent, aralkyl groups optionally containing a substituent and alkyl groups optionally containing a substituent, and both Ar4 and Ar5 are not, at the same time, hydrogen atoms, Ar4 and Ar5 may be bonded to each other via an atom or an atomic group, forming a cyclic structure;
• R1 represents a hydrogen atom, a halogen atom or an alkyl group optionally containing a substituent;
• and R2, R3 and R4 are selected from a hydrogen atom, alkyl groups optionally containing a substituent, aryl groups optionally containing a substituent, heterocyclic groups optionally containing a substituent and aralkyl groups optionally containing a substituent, and when n is 0, Ar3 represents a heterocyclic group optionally containing a substituent.