| 摘要 |
PURPOSE:To obtain an optical recording medium having excellent characteristics on a practical basis and being advantageous on an economical basis, by providing a recording layer comprising a specified phthalocyanine coloring matter on a transparent substrate. CONSTITUTION:A recording layer comprising a naphthalocyanine coloring matter of formula 1 is provided on a transparent substrate. In formula 1, NPc is a naphthalocyanine residue, M is a metal or a necleus of a metallic oxide or halide, A is -COO-, -CH2NR'-,-CH2NHCOCH2NH-, -SO2NR' -or- CONR' (where R' is hydrogen or a 1-20C satd. or unsatd. alkyl), each of m and n is independently an integer of 1-4, and each of R1, R2 is independently hydrogen or a substd. or unsubstd. alkyl, or R1 and R2 to form a heterocyclic ring containing at least nitrogen atom. Fixation of the recording layer comprising the naphthalocyanine coloring matter onto the transparent substrate is most preferably performed by a coating method. |
