| abstract |
An optical recording medium dye is described. The optical recording medium dye is an azo metal chelate compound, wherein the azo metal chelate compound comprises the following structure: n n n wherein R 1 is a hydrogen atom, a C 1-6 straight chain or branched alkyl group, an amino group, an alkylamino group or a tolylamino group; R 2 is a hydrogen atom, a hydroxyl group, a halogen atom, an ether group, a C 1-6 straight chain or branched alkyl group; R 3 is a hydrogen atom, a C 1-6 straight chain or branched alkyl group; R 4 is a hydrogen atom, a C 1-6 straight chain or branched alkyl group or a halogen atom; A 3 is a residue forming a heterocyclic ring derivative together with a carbon atom and a nitrogen atom. |