A photochromic material and an optical storage medium using the same.

摘要

The present invention provides a novel photochromic material which is capable of forming two kinds of aggregates, each having a sharp absorption peak at a different wavelength. The photochromic material comprises a spiropyran compound represented by the following general formula: wherein R<1> and R<2> are independently alkyl groups each containing 1 to 30 carbon atoms, and R<3>, R<4>, R<5>, and R<6> are independently selected from the group consisting of hydrogen, an amino group, an alkoxy group with 1 to 5 carbon atoms, and an alkylamino group with 1 to 5 carbon atoms with the proviso that at least one of R<3>, R<4>, R<5>, and R<6> is an amino group, an alkoxy group or an alkylamino group.