1,1,4,4-Tetraphenyl-1,3- butadiene derivatives and electrophotographic lightsensitive material containing them
申请人:Takasago Perfumery Co., Ltd.
公开号:EP0248590A1
公开(公告)日:1987-12-09
Novel l,l,4,4-tetraphenyl-l,3 derivatives are of the formula:
where R₁ and R₂ each can be a dialkylamino group where the alkyl groups are l-4 C, preferably ethyl, and R₂ can be hydrogen. Nine such compounds are shown. Synthesis is by condensation from 3,3-diphenyl acrolein derivative and a dialkyl l,l-diphenylmethylphosphonate.
The compounds are used as charge transporting substances in electrophotographic material comprising an electrically conductive support (l) bearing a charge generating layer (3) not exceeding 5 µm thick and containing a generating substance (2) e.g. an azo dye, and a charge transporting layer (4) 3-50 µm thick and comprising a binder and l0-90 wt% of a derivative (I) which is coated from a solution, e.g. in dichloroethane.
The material is electrophotographically charged, exposed imagewise and developed to provide a clear copy. The material has high sensitivity and good electrophotographic properties.
新型 l,l,4,4-四苯基-l,3 衍生物的结构式为
其中,R₁ 和 R₂ 均可以是二烷基氨基,其中烷基为 l-4 C,优选乙基,R₂ 可以是氢。图中显示了九种这样的化合物。合成方法是由 3,3-二苯基丙烯醛衍生物和 l,l-二苯基甲基膦酸二烷基酯缩合而成。
这些化合物在电致发光材料中用作电荷传输物质,电致发光材料包括导电支架(l),支架上有厚度不超过 5 微米的电荷产生层(3),其中含有产生物质(2),如偶氮染料;电荷传输层(4),厚度为 3-50 微米,其中包括粘合剂和 10%-90% 的衍生物(I),衍生物(I)由溶液(如二氯乙烷)涂布而成。
该材料经电泳、图像曝光和显影后可获得清晰的副本。该材料具有高灵敏度和良好的电照相特性。