Solid-state photoinduced luminescence switch and its advanced optical applications

Spiropyran（SP）and its derivatives were one of the earliest and most extensive systems in organic photochromic materials.Generally,the distinct absorption changes will occur during the structural isomerization from SP to merocyanine（MC）when the molecule is exposed to the ultraviolet radiation[1].

Spiropyran(SP)and its derivatives were one of the earliest and most extensive systems in organic photochromic materials.Generally,the distinct absorption changes will occur during the structural isomerization from SP to merocyanine(MC)when the molecule is exposed to the ultraviolet radiation[1].In the past decades,many researchers have fo-