| abstract |
An information recording medium showing a highnlight-resistance has a recording layer containing a dyencompound having the following formula (I-1) or (I-2):n nin which each of A 1 , A 2 , B 1 and B 2 is a substituent; eachnof Y 1 and Z 1 is a group of atoms required for forming ancarbon ring or a heterocyclic ring; each of E and G is angroup of atoms required for forming a conjugated doublenbond chain; X 1 is =O, =NR or =C(CN) 2 , wherein R is a substituent;nX 2 is -O, -NR or -C(CN) 2 , wherein R is a substituent;neach of L 1 , L 2 , L 3 , L 4 and L 5 is a methine groupnwhich may have a substituent; M k+ is an onium ion containingna positively charged onium atom to which no hydrogennatom is attached; each of m and n is 0, 1 or 2; each ofnx and y is 0 or 1; and k is an integer of 1 to 10. |