| abstract |
(57) [Summary] (Modified)nPROBLEM TO BE SOLVED: To differ without using a mixed system of organic materials. Optical information recording that enables recording and reproduction even at recording and reproduction wavelengths Highly sensitive optical recording is possible in the medium, especially in the blue light region. Yes, applicable to recording / reproducing wavelengths of 350 to 500 (nm) Writable optical information recording medium.nA porphyrin derivative represented by the following formula (1): In the conductor, R 1 ~ R Four One of which is a nitrogen atom Monoazaporphyrin compound, the rest being carbon atoms Optical information recording medium characterized by using as a recording layer body.n X 1 ~ X 8 Are independently a hydrogen atom, a halogen atom, M is two hydrogen atoms such as a toro group and a cyano group, or an acid Element, a metal atom which may have halogen, or (O R Five ) P, (OSiR 6 R 7 R 8 ) Q, (OPOR 9 R Ten ) r, (OCOR 11 ) Represents a metal atom which may have s. R Five ~ R 11 Are independently hydrogen atoms, substituted or unsubstituted fats Represents an aliphatic or aromatic hydrocarbon group, and p, q, r, and s are 0 to 2; Represents an integer. |