Importance

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Abstract

This invention relates to an optical recording medium, comprising a substrate, a recording layer and a reflecting layer, where the recording layer comprises at least one dye of formula ##STR1## wherein A.sub.1 and A.sub.2 are each independently of the other C(CH.sub.3).sub.2, O, S, Se, or CH.dbd.CH which is unsubstituted or substituted by C.sub.1 -C.sub.5 alkyl or benzyl; M.sub.1 and M.sub.2 are each independently of the other Cr.sup.3+ or Co.sup.3+ ; L.sub.1 and L.sub.1 ' are each independently of the other a ligand of formula ##STR2## L.sub.2 and L.sub.2 ' are each independently of the other and independently of L.sub.1 and L.sub.1 ' a ligand of formula (II), (III) or ##STR3## m is a number from 0.2 to 1.0; and n, depending on m, is a number from 0.0 to 0.8, so that the sum of m and n equals 1.0; p and q are each independently of the other 0 or 1; and Q is CR.sub.15, CR.sub.15 --CR.sub.16 .dbd.CR.sub.17 or CR.sub.15 --CR.sub.16 .dbd.CR.sub.17 --CR.sub.18 .dbd.CR.sub.19. This invention also claims the dyes of formula (I) themselves as well as a process for optically recording, storing or reproducing information using a recording medium of this invention, recording or reproduction preferably being carried out at the wavelength range from 600 to 800 nm.

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First Claim