A series of 2,5-bis(diarylmethylene)-2,5-dihydrothiophenes and their furan, selenophene, and N-methylpyrrole analogs were synthesized in three steps either starting from 2,5-dilithiated five-membered heteroaromatics and 2 equiv of diaryl ketones or from 2,5-diaroyl five-membered heteroaromatics and 2 equiv of aryllithiums.
Quinomethane compounds having a structure represented by the general formula (1):
1
wherein R
1
to R
4
and R
9
to R
12
are the same or different and each represents a hydrogen atom, an alkyl group having 1 to 12 carbon atoms, a cyclic alkyl group, an aryl group, or an alkoxy group having 1 to 6 carbon atoms; R
5
and R
6
are the same or different and each represents an alkyl group having 1 to 12 carbon atoms, an aryl group, or a heterocyclic group; R
7
and R
8
each represents a hydrogen atom; and optional substituents are each a halogen atom, an alkyl group having 1 to 6 carbon atoms, an alkoxy group having 1 to 6 carbon atoms, an aryl group, or a heterocyclic group. Since these compounds transport electrons efficiently, they are useful in electrophotographic photoreceptors and/or organic electroluminescence applications.
Electrophotographic photoreceptor, and electrophotographic apparatus using the same
申请人:Fuji Electric Imaging Device Co., Ltd.
公开号:US20030219664A1
公开(公告)日:2003-11-27
An electrophotographic photoreceptor has excellent electrical properties and is stable even upon repeated use. An electrophotographic apparatus using the electrophotographic photoreceptor uses a compound having an excellent electron transporting ability in a photosensitive layer of the electrophotographic photoreceptor. An electrophotographic photoreceptor, in which a photosensitive layer is located on an electrically conductive substrate either directly or via an undercoat layer, contains a compound having a structure represented by the general formula (I).
1
An electrophotographic apparatus contains the above-mentioned electrophotographic photoreceptor, and carries out a charging process through a positive charging process.