abstract |
A phthalocyanine compound represented by the following general formula (I) and the mixture thereof, and an optical recording medium containing the compound/mixture in its recording layer. n n nwherein in formula (I), M is two hydrogen atoms, a divalent metal atom, a mono-substituted trivalent metal atom, a di-substituted tetravalent metal atom, or an oxymetal, and L 1 , L 2 , L 3 and L 4 are each independently formula (a), formula (b), or formula (c): n nwherein X, Y, Z and R are defined. |