| 摘要 |
<p>A layered electrophotographic element comprises an electroconductive support bearing a charge generating layer and a charge transfer layer superimposed on the charge generating layer; the charge generating layer containing, as charge generating agent, a disazo pigment of the formula
<CHEM>
and the charge transfer layer comprises a polycarbonate binder and, as charge transfer agent, a compound of the formula
<CHEM>
(in which the group ----X---- represents a ring system fused to benzene ring B and selected from benzene, naphthalene, indole, carbazole and benzofuran ring systems, and substituted derivatives thereof;
Ar<1> is a phenyl, naphthyl, dibenzofuranyl or carbazolyl group or a substituted derivative thereof);
Ar<2> is a phenyl or naphthyl group or a substituted derivative thereof;
R<1> is a hydrogen atom, a lower alkyl group or a phenyl group or substituted derivation thereof; and
R<2> is a lower alkyl group or a carbonyl group or alkyl ester thereof; and </p> |
