申请人:SETO Nobuo
公开号:US20090022047A1
公开(公告)日:2009-01-22
The optical recording medium comprises a visible information recording layer comprising at least two dyes of the following dyes.
R
a1
to R
b3
each independently denote a hydrogen atom or a monovalent substituent, R
a2
and R
a3
may bond together to form a five to seven-membered heterocyclic ring, A denotes a substituted or unsubstituted aliphatic group, substituted or unsubstituted aryl group, or substituted or unsubstituted heterocyclic group, n denotes 0, 1, 2, or 3.
Za
21
and Za
22
each independently denote an atom group forming an acidic nucleus, Ma
21
to Ma
23
each independently denote a substituted or unsubstituted methine group, Ka
21
denotes an integer ranging from 0 to 3, and Q denotes a monovalent cation.
A
1
=N—B
1
General formula (III)
A
1
denotes a substituted or unsubstituted heterocyclic group, a substituted aliphatic group, or a substituted or unsubstituted carbocyclic group, and B
1
denotes a substituted or unsubstituted heterocyclic group or a substituted or unsubstituted aryl group.