Electrophotographic photosensitive member with pyrazoline charge transport material

Abstract

Abstract An electrophotographic photosensitive member is characterized by comprising a layer which contains at least one pyrazoline compound represented by the following formula (I) or (II): ##STR1## wherein m and n represent 0 or 1; when both m and n are 0, X 1 represents a substituted or unsubstituted heterocyclic residue; R 1 represents a substituted or unsubstituted aryl or heterocyclic residue; R 2 and R 3 each represent hydrogen or a substituted or unsubstituted aryl or heterocyclic residue; or they form spiropyrazoline cojointly with the carbon atom to which they are linked; and R 5 represents hydrogen, a halogen, or a substituted or unsubstituted alkyl or aryl; when m is 1 and n is 0, X 1 represents a substituted or unsubstituted heterocyclic residue; R 1 and R 2 each represent a substituted or unsubstituted aryl or heterocyclic residue; R 3 represents hydrogen; and R 4 and R 5 each represent hydrogen, a halogen, or a substituted or unsubstituted alkyl or aryl; when m is 0 and n is 1, X 1 , R 1 , R 2 , and R 3 each represent a substituted or unsubstituted aryl or heterocyclic residue, R 2 and R 3 may also form spiropyrazoline cojointly with the carbon atom to which they are linked, and one of R 2 and R 3 can also be hydrogen but X 1 is not a substituted or unsubstituted aryl unless R 2 and R 3 form spiropyrazoline as mentioned above; and R 4 and R 5 each represent hydrogen, a halogen, or a substituted or unsubstituted alkyl or aryl; if R 3 , R 4 , and R 5 each are hydrogen, neither R 1 nor R 2 is a di-substituted aminophenyl; when both m and n are 1, X 1 represents a substituted or unsubstituted heterocyclic residue; R 1 and R 2 each represent a substituted or unsubstituted aryl or heterocyclic residue; and R 4 and R 5 each represent hydrogen, a halogen, or a substituted or unsubstituted alkyl or aryl. ##STR2## wherein X 2 and X 3 each represent a substituted or unsubstituted heterocyclic residue; R 6 represents a substituted or unsubstituted divalent hydrocarbon residue; R 7 and R 8 each represent a substituted or unsubstituted aryl or heterocyclic residue; and R 9 and R 10 each represent hydrogen, a halogen, or a substituted or unsubstituted alkyl or aryl.

Inventors

• 👤 Yoshio Takasu
• 👤 Shozo Ishikawa

Bibliographic Details