Nippon Kayaku Kabushiki Kaisha

Hiroshima University

Tatsuto Yui

Masaaki Ikeda

Takafumi Fujii

Hirokazu Kuwabara

Kazuo Takimiya

Koji Hirota

Hideaki Ebata

Coloring matters represented by general formula (1) or salts thereof are simply provided at a low cost as water-soluble coloring matters which exhibit absorption in the near-infrared region. Further, aqueous ink compositions which contain the coloring matters and have excellent storage stability are also provided. In general formula (1), Nc is optionally substituted naphthalocyanine; M is a metal oxide or the like; Rand Rare each independently hydrogen or the like; A is a crosslinking group; X and Y are each independently substituted arylamino or the like; k is more than 0 but up to 12 (on average); p is 0 to less than 12; the sum of k and p is more than 0 but up to 12; and any two or the three of R, Rand A may be united to form a ring. 

Water-soluble near-infrared absorbing coloring matters and aqueous inks containing same

Disclosed is a field-effect transistor characterized by using a compound represented by the formula (1) below as a semiconductor material. (In the formula (1), Xand Xindependently represent a sulfur atom, a selenium atom or a tellurium atom; and Rand Rindependently represent an unsubstituted or halogeno-substituted C-Caliphatic hydrocarbon group.)

Field-effect transistor

Growing community of inventors

Tokyo, Japan

Tatsuto Yui