| abstract |
The invention relates to an optical recording medium comprising a substrate, a reflecting layer and a recording layer based on compounds of formula (I) wherein G<SUB>1 </SUB>and G<SUB>2 </SUB>are each independently of the other, A<SUB>1 </SUB>and A<SUB>2 </SUB>are each independently of the other N(R<SUB>12</SUB>), O, S or Se and A<SUB>3 </SUB>is C(C<SUB>1</SUB>-C<SUB>5</SUB>alkyI)<SUB>2</SUB>, C(C<SUB>4</SUB>-C<SUB>5 </SUB>alkylene), N(R<SUB>12</SUB>), O, S, Se, N-C(R<SUB>13</SUB>) or unsubstituted or R<SUB>14</SUB>-substituted CH-CH; M<SUB>1 </SUB>is a transition metal of groups (IX) to (XIII), preferably Co, Cu, Ni, Pd or Zn, especially Co, Cu or Ni; Q<SUB>1 </SUB>and Q<SUB>2 </SUB>are each independently of the other C(R<SUB>15</SUB>), N or P, . . . For the detailed definitions of the further substituents, see the description. Recording and playback are effected especially at a wavelength of from 350 to 500 nm, for example using a blue laser. The recording and playback quality is excellent and allows a high storage density. Also claimed are new compounds of formula (I), with the exception of the compounds disclosed in J. Org. Chem. 67/16, 5753-5772 [2002]. |