| 摘要 |
PROBLEM TO BE SOLVED: To provide a write once optical information recording medium capable of dealing with a recording/reproducing wavelength of 400 to 500 (nm) or particularly 400 to 450 (nm). SOLUTION: The optical information recording medium comprises a recording layer for recording information by bringing about a reflectivity change by irradiating a recording light. The recording layer contains a tetraazaporphyrin compound represented by formula (1), wherein X1 to X8 are each independently a hydrogen atom, halogen atom, nitro group, cyano group, hydroxyl group, carbonyl group, substituted or unsubstituted alkyl group, substituted or unsubstituted alkoxy group, substituted or unsubstituted aryl group, substituted or unsubstituted amino group, substituted or unsubstituted acyl group, R1, R2 are each independently a hydrogen atom, substituted or unsubstituted alkyl group, substituted or unsubstituted aryl group, acyl group or substituted silyl group. However, R1, R2 do not simultaneously become the hydrogen atom. |
