| 摘要 |
An object of the present invention is to provide an optical recording medium that is excellent in recording and reading-out characteristics in the case of using a shortwave semiconductor laser and is good in light resistance and durability. A metal-containing azo compound comprising an azo compound represented by the following general formula [I] and at least one metal salt: General formula [I] wherein X is a hydroxyl group, a carboxyl group, a sufonamide group, a carbonylamide group or an amino group, R1 and R2 are independently a hydrogen atom, a substituted or unsubstituted and linear or branched alkyl group, a substituted or unsubstituted and unsaturated hydrocarbon, a substituted or unsubstituted aromatic ring, or an alkoxy group, each of R3, R4, R5, R6, R7 and R8 is a hydrogen atom, a linear or branched alkyl group which may have one or more substituents, a linear or branched and unsaturated hydrocarbon which may have one or more substituents, a substituted or unsubstituted aromatic ring, an alkoxy group, a halogen atom or a cyano group, and a combination of R1 and R2 or a combination of R6 and R7 may form a ring through a connecting group.
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