| 摘要 |
PROBLEM TO BE SOLVED: To provide an information recording medium having high reflectivity, high sensitivity and high modulation factor. SOLUTION: In the information recording medium comprising a recording layer capable of recording information by irradiating with a laser having a wavelength of 550 nm on a base, the recording layer contains a dye compound represented by formula I or formula II, wherein A, B, B1 and R are each a hydrocren atom and a substituent, Y1 and Z1 are each an atomic group necessary to form a carbon ring or a heterocycle, E and G are each an atomic group necessary to complete a conjugated double bond chain, X1 is =O, =NR1 or =C(CN)R1 (wherein R1 is a substituent), X2 is -O -NR1 or -C(CN)R1 (wherein R1 is a substituent), x and y are each independently 0 or 1, n is 0, 1 or 2, Mk+ is a cation, and k is an integer of 1 to 10.). |
