Fast-writable and precision-writable high-capacity optical storage media

Abstract

The invention relates to an optical recording medium, comprising a substrate and a recording layer, wherein the recording layer comprises a compound of formula (I), wherein R, R, R, R, R, R, R, R, R, R, R, Rand Rare each independently of the others hydrogen, Gor C-Calkyl, C-Calkenyl, C-Calkynyl, C-Ccycloalkyl, C-Ccycloalkenyl, C-Caralkyl, C-Caryl, C-Cheteroaryl or C-Cheterocycloalkyl, each unsubstituted or substituted by one or more identical or different substituents G, wherein Rand R, Rand R, Rand R, Rand R, Rand R, Rand R, Rand R, Rand R, Rand R, Rand R, Rand R, Rand Rand/or Rand Rcan independently of one another be bonded to one another in pairs separately or, when they contain substitutable sites, via a direct bond or via a —CH—, —O—, —S—, —NH— or —NC-Calkyl-bridge in such a manner that, together with the atoms and bonds indicated in formula (I), five- or six-membered, saturated, unsaturated or aromatic, unsubstituted or G-substituted rings are formed, Gis any desired substituent,?m-is an inorganic, organic organometallic anion, Yis a proton or a metal, ammonium or phosphonium cation, and m and n are each independently of the other a number from 1 to 5, and p and q are each independently of the other O or a number from 0.2 to 6, the ratio of p and q to one another, depending upon m and n and, as applicable, the number of charged G, being such that in formula (I) there is no excess positive or negative charge. Generally the optical recording medium according to the invention additionally comprises a reflecting layer. The recording media according to the invention exhibit high sensitivity and good playback characteristics, especially at high recording and playback speeds. The light stability is also excellent.