Nara Institute of Science and Technology

Kazuya Ogawa

Yoshiaki Kobuke

Akiharu Satake

Shin-ichi Kugimiya

Compounds described herein are suitable for use in three-dimensional optical recording materials, etc. The compounds each have a structure that allows pi-electron conjugation to be achieved by linking a porphyrin ring and a perinaphthothioindigo ring to each other with a straight-chain atomic group. The compounds are suitable for use in three-dimensional optical recording materials, etc. since they have a high two-photon absorption efficiency and undergo photochromism effectively through optical absorption. The compounds include those represented by the following formula ():P&#x2014;[Y]&#x2014;P&#x2003;&#x2003;(1)where Pcorresponds to a porphyrin ring; Pcorresponds to a perinaphthothioindigo ring a hydrogen atom, or a halogen atom; and Y is a group that links Pand P.

Porphyrin compound, process for producing porphyrin compound, three-dimensional optical recording material, and three-dimensional optical recording medium

A porphyrin/phthalocyanine dimer represented by the following Formula (A-1) and a tetramer represented by the following Formula (A-2) (where R, Rand Rmay be the same or different, and each represents a hydrogen atom or an alkyl or alkyloxy group; Mand Mmay be the same or different, and each represents two protons or a bivalent or trivalent metal ion; Xrepresents a single bond or an alkylene group; X represents &#x2014;O&#x2014;, &#x2014;S&#x2014;, &#x3e;NR(where Rrepresents H or alkyl group), CH, or a single bond; Y represents 2H, &#x2550;O or &#x2550;S; m is an integer of 0 to 4; Z represents a five- or six-membered nitrogen-containing coordinating heteroaromatic ring group; provided that the multiple substituent groups represented by the same character may be the same or different. 

Porphyrin-phthalocyanine dimer and tetramer having directly-bound &#x3c0; electron systems and production method thereof

A porphyrin array exhibiting a large two-photon absorption property, and being linked with an acetylenic bond(s), represented by the following formulas:wherein Rrepresents an alkyl or aryl group, Mrepresents a metal ion capable of serving as a core metal and forming a coordinate bond with Im, Mrepresents two protons or a metal ion incapable of forming a coordinate bond with Im, Rand Rrepresent a group selected from a porphyrin residue or porphyrin metal complex residue, a cyclic diimide residue, a dialkylviologen residue, a benzoquinone residue, an N-methylpyrrolidine-fullerene derivative residue and a ferrocene residue, Im is represented by Imor Im:(Rrepresents methyl or H), Lrepresents &#x2014;(&#x2014;C&#x2261;C&#x2014;)&#x2014; (m=1 to 3); n represents an integer of 1 or more; Rrepresents one of R, R, Rand Im.

Porphyrin array exhibiting large two photon absorption property and including, as structural unit, bis (imidazolylporphyrin metal complex) linked with acetylenic bond and the derivative thereof, and method of producing the same

Growing community of inventors

Ikoma, Japan

Kazuya Ogawa