| abstract |
An information recording medium showing a high light-resistance has a recording layer containing a dye compound having the following formula (I-1) or (I-2): <CHEM> in which each of A<1>, A<2>, B<1> and B<2> is a substituent; each of Y<1> and Z<1> is a group of atoms required for forming a carbon ring or a heterocyclic ring; each of E and G is a group of atoms required for forming a conjugated double bond chain; X<1> is =O, =NR or =C(CN)2, wherein R is a substituent; X<2> is -O, -NR or -C(CN)2, wherein R is a substituent; each of L<1>, L<2>, L<3>, L<4> and L<5> is a methine group which may have a substituent; M<k+> is an onium ion containing a positively charged onium atom to which no hydrogen atom is attached; each of m and n is 0, 1 or 2; each of x and y is 0 or 1; and k is an integer of 1 to 10. |