Mitsui Chemicals, Inc.

Yamamoto Chemicals, Inc.

Ryousuke Nara

Tsutami Misawa

Akira Ogiso

Tadashi Koike

Hisashi Tsukahara

Taizo Nishimoto

Tsutomu Ishida

Koji Inoue

Yuji Inatomi

Keiji Ueno

Shinobu Inoue

Norihiko Mihara

Hiroyoshi Shiozaki

Shunsuke Murayama

An optical recording medium containing one or more compounds selected from imide compounds having a metallocene residue in a recording layer and an imide compound represented by a general formula (1): wherein a ring AR represents a substituted or unsubstituted aromatic ring residue or a residue formed by combining two or more aromatic ring residues via one or more linking groups; n represents the number of imide groups bonded to the ring AR; Arepresents any one of substituents Ato Abonded to a nitrogen atom of each imide group; and m represents an integer of from 1 to n, with the proviso that at least one substituent selected from the group consisting of Ato Ais one having at least one substituted or unsubstituted metallocene residue.

Imide compound and optical recording media made by using the same

An optical recording medium having a recording layer which contains at least one compound selected from the group consisting of mono-, di-, and triazaporphyrin compounds optionally in the form of a metal complex; or an optical recording medium comprising a substrate and formed thereon at least a recording layer containing an organic dye as a main component, characterized in that the organic dye has a first maximum value of absorption at a wavelength &#x3bb;of 400 nm or less in the absorption spectrum and has a second maximum value of absorption at a longer-wavelength side than the &#x3bb;, and a wavelength band wherein the refractive index (n) and the absorption coefficient (k) of the above organic dye satisfy n&#x2267;1.90 and 0.03&#x2266;k&#x2266;0.30.

Optical recording medium and novel azaporphyrin compounds

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Sodegaura, Japan

Ryousuke Nara