| 摘要 |
An optical recording medium comprising a substrate, a reflecting layer and a recording layer, which recording layer consists essentially of one or more than one dye of formula (I) or chlorination or bromation products thereof (see fig.I) wherein R1 and R2 are each independently of the other C1-C6alkyl or C2-C8alkenyl; R3, R6, R9 and R12 are hydrogen, halogen, CN, CHO, C1-C8alkyl or unsubstituted or substituted C6-C14aryl; R4, R5, R7, R8, R10 and R11 are hydrogen, halogen, NO2, CHO, COOR13, CONR14R15, CN or unsubstituted or substituted C1-C8alkyl or C2-C8alkenyl; or R4 and R5, R7 and R8 and/or R10 and R11 together are an unsubstituted or substituted 1,4-buta-1,3-dienylene, 2-buten-1,4-diylidene, 1,3-propylene or 1,4-butylene bridge, so as to form, optionally together with the shared C-C or C=C group, a five- or six-membered ring; and M is H2 or a divalent metal atom, oxometal, halogenometal or hydroxymetal which may be coordinaled to one or two neutral ligands. The recording media of this invention have high sensitivity and resolution as well as good reproduction characteristics.
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