| 摘要 |
An optical information recording medium comprises an optical information recording medium comprising a substrate being a recording layer containing a polymethine dye and a salt of a metal complex anion with a cation of the formula: <IMAGE> in which Z is an optionally substituted group <IMAGE> R1 and R2 are optionally substituted C1-C6 alkyl or phenyl, m is 1 or 2 and A is an optionally substituted group <IMAGE> where n is 1 or 2. Alternatively the group phenyl group is the group Z may form a condensed aromatic ring. Where m is 2, A may be a group <IMAGE> in which R<3>, R<4>, R<5> and R<6> are each hydrogen or an optionally substituted C1-C6 alkyl group; or A may be <IMAGE> in which X is (i) an optionally substituted phenyl group, (ii) a cyclohexylamino group, (iii) a benzylamino group the phenyl moiety of which may be substituted or (iv) a di (C1-C4 alkyl) amino group; and Y has the same meaning as X or is hydrogen, halogen, a C1-C6 alkyl, alkoxy or alkylthio group or a hydroxyl group. |
