Organic compounds -- part of the class 532-570 series – Organic compounds – Amino nitrogen containing
Patent
1997-09-02
1999-06-08
Geist, Gary
Organic compounds -- part of the class 532-570 series
Organic compounds
Amino nitrogen containing
564316, 564433, 430 59, C07C21113
Patent
active
059106107
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to a novel triphenylamine derivative represented by the following general formula (1): ##STR2## wherein R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5, and R.sup.6 may be the same or different and each represents a hydrogen atom, a lower alkyl group, an alkoxy group, a phenoxy group, a halogen atom, or an aryl group which may have a substituent group, and m and n each represents 0 or 1. This invention further relates to a charge-transporting material comprising the novel triphenylamine derivative and to an electrophotographic photoreceptor containing the charge-transporting material.
The present invention also relates to a process for the preparation of a triphenylamine derivative represented by the following general formula (6): ##STR3## wherein R.sup.7 to R.sup.13 may be the same or different and each represents a hydrogen atom, a lower alkyl group, an alkoxy group, a phenoxy group, a halogen atom or an aryl group which may have a substituent group; 1.sub.1 and 1.sub.2 each represents 0 or 1; and Z represents a hydrogen atom, a lower alkyl group, an alkoxy group, a phenoxy group, a halogen atom, an aryl group which may have a substituent group or a group represented by any one of the following general formulae (7a), (7b) and (7c): ##STR4## wherein R.sup.10 to R.sup.13, 1.sub.1 and 1.sub.2 are as defined in the foregoing general formula (6); R' and R" may be the same or different and each represents a hydrogen atom, a lower alkyl group, an alkoxy group, a phenoxy group, a halogen atom or an aryl group which may have a substituent group; and 1.sub.3 represents 0 or 1, said triphenylamine derivative including the foregoing novel triphenylamine derivative represented by the general formula (1).
The present invention further relates to a process for the preparation of a poly-formyl-substituted triphenylamine derivative represented by the following general formula (4) useful as an intermediate for the preparation of the foregoing triphenylamine derivative represented by the general formula (1) and/or (6): ##STR5## wherein R.sup.7, R.sup.8 and R.sup.9 may be the same or different and each represents a hydrogen atom, a lower alkyl group, an alkoxy group, a phenoxy group, an aryl group which may have a substituent group or a halogen atom; and Y represents a formyl group, a hydrogen atom, a lower alkyl group, an alkoxy group, a phenoxy group, a halogen atom or an aryl group which may have a substituent group.
BACKGROUND ART
Inorganic photoconductive materials recently in use include amorphous silicon, amorphous selenium, cadmium sulfide, zinc oxide, and the like. However, some of these materials are expensive because of difficulties in production thereof, while others are toxic and disadvantageous from the standpoint of environmental protection.
On the other hand, as organic photoconductors, ones of the type comprising, in particular, a charge-generating material and a charge-transporting material which respectively perform their functions are proposed extensively (e.g., U.S. Pat. No. 3,791,826). In this type, there is the possibility that a high-sensitivity electrophotographic photoreceptor might be obtained by using a substance which efficiently generates carriers (The term "carriers" means "charges"; the same applies hereinafter) as the charge-generating material in combination with a substance having high charge-transporting ability as the charge-transporting material.
Of these materials, the charge-transporting material is required to efficiently receive the carriers generated in the charge-generating material upon light irradiation in an electric field and permit them to rapidly move through the photosensitive layer to extinguish the surface charges promptly. The speed at which carriers move per unit electric field is called carrier mobility. A high carrier mobility means that carriers rapidly move in the charge-transporting layer. Any charge-transporting material has its intrinsic carrier mobility and, hence, it is necessary that for attaining a high carrier mo
REFERENCES:
patent: 4769302 (1988-09-01), Ueda
patent: 5246808 (1993-09-01), Hanatani
patent: 5573878 (1996-11-01), Hagiwara
Hagiwara Toshimitsu
Kobayashi Tohru
Matsushima Yoshimasa
Sugiyama Hiroshi
Geist Gary
Takasago International Corporation
Vollano Jean
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