High-capacity storage media

摘要

The invention relates to an optical recording medium comprising a substrate, a reflecting layer and a recording layer, which recording layer consists essentially of a dye of the formula (I), (I) in which R1 and R6 are hydrogen or unsubstituted or substituted alkyl, alkenyl, alkynyl, aralkyl or aryl, R6 and R7 are unsubstituted or substituted alkyl, alkenyl, alkynyl, aralky or aryl, R3, R4, R8 and R9 are hydrogen, halogen, OR17, SR17, NR18R19, NO2, alkyl, alkenyl or Alkynyl, R5 and R10 are hydrogen, halogen, OR17, SR17, NO2, NR18R19 or unsubstituted or substituted alkyl, alkenyl, alkynyl or aralkyl, and R11 is hydrogen, (CH2)1-10COO-, (CH2)1-10COOR24, alkyl, alkenyl, alkynyl or unsubstituted or substituted aralkyl or aryl; Y is the anion of an inorganic, organic or organometallic acid, Z is a metal cation, ammonium cation or phosphonium cation, m, n and o are from 1 to 3, and p and q are from 0 to 4; and the stoichiometry of o, p and q is such as not to result in any excess positive or negative charge in the formula (I). The substituents can, if desired, be connected to one another in such a way, via a direct bond or via a bridge -O- or -NR12-, as to form additional five- or six-membered rings. The novel recording media are of high sensitivity and have good reproduction characteristics.