Hodogaya Chemical Co., Ltd.

Shigetaka Numazawa

Shigeru Kusano

Makoto Nagaoka

Katsumi Abe

Norimasa Yokoyama

Shuichi Hayashi

Makoto Koike

Keigo Naito

Si In Kim

Shingo Ozawa

Yasuaki Miyazaki

Mari Toriya

Kanae Otsuka

Shirou Irisa

Kiyotaka Ihara

There is provided a compound represented by the following general formula (1).[Chem. 1](X)(Z)&#x2003;&#x2003;(1)

Compound including basic dye and amino acid, hair dyeing dye, and hair dyeing composition

According to the present invention, there are provided an indenoindole derivative represented by the following general formula (1); and an organic electroluminescent element including a pair of electrodes and at least one organic layer sandwiched therebetween, wherein the above compound is used as a constituent material for the at least one organic layer. The indenoindole derivative of the present invention provides an organic compound, which is excellent in hole injection/transport performance, has electron blocking capability, is highly stable in a thin film state, and excels in heat resistance, as a material for a high efficiency, high durability organic electroluminescent element. An organic electroluminescent element formed using this compound is highly efficient and highly durable. 

Indenoindole derivative and organic electroluminescent element

Naphthotriazole derivatives represented by the following general formula (1), wherein, Aris an aromatic hydrocarbon group or an aromatic heterocyclic group, and A is a group that contains an aromatic heterocyclic group. The compound features excellent electron injection/transporting capability, a high hole-blocking power and a high stability in the form of a thin film, and can be used as a material for producing highly efficient and highly durable organic electroluminescent devices.

Naphthotriazole derivatives and organic electroluminescence devices

A Benzotriazole derivative represented by the following general formula (1), 

Benzotriazole derivative and an organic electroluminescent device

Benzotriazole derivatives represented by the following general formula (1), wherein Arand Arare, for example, aromatic hydrocarbon groups or aromatic heterocyclic ring groups, and A is a group including a pyridine ring. The compounds excel in electron injection/transport capability, feature a high hole-blocking power and a high stability in their thin-film form, and are useful as materials for producing highly efficient and highly durable organic electroluminescent devices.

Benzotriazole derivatives and organic electroluminescent devices using the derivatives

[Problems] To provide a novel compound which has a high carrier mobility and is useful as a charge-transporting agent that is not only capable of stably forming a photosensitive layer without precipitating crystals or forming pinholes at the time of forming the photosensitive layer but is also capable of forming an organic photosensitive material for electrophotography that has a high sensitivity and a low residual potential. [Means for Solution] A diphenylnaphthylamine derivative represented by the following general formula (1), 

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Tokyo, Japan

Shigetaka Numazawa