Kabushiki Kaisha Hayashibara Seibutsu Kagaku Kenkyujo

Akira Shinpo

Sadaharu Suga

Makoto Satsuki

Yasunori Taga

Hisayoshi Fujikawa

Chihaya Adachi

Shizuo Tokito

Koji Noda

Yoshio Taniguchi

Atsushi Miura

Toshiki Koyama

Tomoyasu Saitou

Yoshikazu Sakaguchi

Atsushi Oda

Kentaro Yano

Hiroshi Tada

Yasushi Aizawa

Yasuyo Ooga

Yoshimi Takahashi

An objective of this invention is to extend the range of choosing organic dye compounds as light-absorbing agent in a variety of fields of, for example, information storage, information display, solar energy generation, electric machinery apparatus, electric communicating apparatus, optical apparatus, cloth, building/bedding/decorating product, sanitary and health goods, and agricultural material by providing an organic dye compound which is superior in light-absorbing property, light resistance, and solubility in the near-infrared region: The objective is attainable by providing a cyanine dye that bears within the same molecule a plurality of cyanine dye skeletons bound to a divalent group(s) and an organometallic complex as counter ion, as well as substantially absorbing a light with a wavelength longer than 700 nm.

Cyanine dye

4-Cyanocoumarin derivatives which have a distinct sensitivity to visible light, distinct luminescent ability, and satisfactory applicability for photochemical polymerization, dye lasers, and organic electroluminescent elements. Since most of the derivatives have a fluorescent maximum wavelength of 600 to 650 nm, particularly, 610 to 630 nm, they are extremely useful as luminescent agents for organic EL elements which emit visible light in a red-color region, and can be quite useful as luminescent agents in organic EL elements and laser-active substances in dye lasers, as well as luminous bodies as lighting sources for lighting devices, and information displays for visually displaying information.

4-cyanocoumarin derivatives and uses thereof

Disclosed are pyran derivatives, which have distinctive sensitivity to visible light and distinctive luminous ability. The derivatives are useful in photopolymerization, electroluminescence, and dye lasers, and are obtainable through a step of reacting a compound having a 4-cyanomethylene-2-methyl-4H-pyran skeleton with a compound having a 3-formylcoumarin skeleton.

Pyran derivatives

Growing community of inventors

Okayama, Japan

Akira Shinpo