申请人:Bacher Jean-Pierre
公开号:US20070248782A1
公开(公告)日:2007-10-25
The invention relates to an optical recording medium comprising a substrate, a reflecting layer and a recording layer, wherein the recording layer comprises a compound of formula
preferably a compound of formula
or a mesomeric or tautomeric form thereof, wherein
A
h+
is an organic cation having h quaternary ammonium or phosphonium groups;
Q
1
is N or CR
15
, Q
2
is N or CR
16
, Q
3
, Q
5
and Q
7
are each independently of the other CR
17
R
18
, O, S or NR
19
, Q
4
is CR
13
or N and Q
6
is CR
14
or N; and one of R
1
and R
3
is OR
17
, OR
20
, SR
17
, SR
20
, NR
17
R
18
, NR
18
R
20
or NR
20
R
21
, and the other of R
1
and R
3
is O
−
, S
−
or N
−
R
22
.
The compounds of formula (I) and (II) are novel and also claimed, as well as mixtures thereof with metal complexes. The optical recording media are remarkably suitable for DVD±R (658 nm), especially at high recording speeds.