Information recording medium

Details Information recording medium Information recording medium

1992-07-20

1994-01-04

Raymond, Richard L.

Organic compounds -- part of the class 532-570 series

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

544139, 5483017, C07D48704

Patent

active

052761630

ABSTRACT:
The information recording medium of the invention comprises a substrate and a recording layer for recording information by a laser beam, and the recording layer contains a cyanine dye having the following formula (I): ##STR1## wherein each of A.sup.1 and A.sup.10 is an atom group for completing an aromatic ring which may have one or more substituents; L.sup.1 is a methine group which may have one or more substituents or a trivalent connecting group of conjugated 3, 5 or 7 methines which may have one or more substituents; each of R.sup.11, R.sup.12, R.sup.13 and R.sup.14 is a hydrogen atom, or an alkyl, phenyl, acyl, alkoxy or 5- or 6-membered heterocyclic group which may have one or more substituents; each of R.sup.15 and R.sup.16 is an alkyl group which may have one or more substituents and one of said substituents may have an anionic moiety; X.sub.a.sup.p-- is an anion; p is 1, 2 or 3; m is 1 or 0; and m is 0 when R.sup.15 or R.sup.16 has a substituent having an anionic moiety.

REFERENCES:
patent: 3931156 (1976-01-01), Libeer et al.
Hiller, Chemical Abstracts, vol. 74 (1971) 93451p.

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