| abstract |
Optical data carriers whose information layer comprises at least one light-absorbent compound which is a Co(III) phthalocyanine in which the Co metal centre bears an axial substituent R 1 and an axial coordinated ligand R 2 , where R 1 is CN, SCN, halogen, in particular Cl, Br or F, alkoxy, aryloxy, arylthio or alkylthio and R 2 is no ligand or substituted or unsubstituted amine, water, an alcohol, H 2 S, a thioalcohol or an isonitrile. |