HIGH CAPACITY OPTICAL STORAGE MEDIA COMPRISING ORGANOMETALLIC ION PAIRS

摘要

The invention , wherein the recording track comprises a compound of formula (I) or a mesomeric or tautomeric form thereof and are each independently of the other, or ; is or C₂-C₈heteroaryl unsubstituted or mono- or poly-substituted by R₄₇, R₄₈, R₄₉ and/or R₅₀; Q₁ and Q₆ are each independently of the other O or S; Q₂ and Q₄ are each independently of the other O, S or NR₅₁; Q₃ is N or CR₅₂; Q₅ is N, or is CR₁₄ when Q₄ is O or S; Q₇ is O, S, CR₂₂R₂₃ or NR₃₅; Q₈ and Q₁₀ are each independently of the other CR₅₃R₅₄, O, S or NR₅₅; Q₉ is CR₄₃ or N; Q₁₁ is CR₅₆ or N; Q₁₂, Q₁₄ and Q₁₆ are each independently of the other CR₅₇R₅₈, O, S or NR₅₁; Q₁₃ and Q₁₅ are each independently of the other CR₅₉ or N. The structures of the cations and the substituents are defined in the description. The invention also pertains to the use of compounds of the formula (I) in optical recording with a blue laser as well as to optical recording processes wherein pits of either lower or higher reflecticity are written on a track comprising compounds of the formula (I). Hence, the invention finally also relates to an optical recording medium comprising a recording dye which is bathochromic as compared with the laser wavelength, on which medium pits of lower reflectivity are written on a higher reflectivity track.