Synthesis, characterization and photochromic studies in film of heterocycle-containing spirooxazines

A series of novel heterocycle-containing spirooxazines have been designed and synthesized, and their photochromic properties were investigated under flash photolysis and continuous irradiation in particular regard to the fatigue resistance, the lifetime of the colored merocyanine form in various solutions and polymers. Especially, the characteristics of two UV-sensitive spirooxazines dispersed polymethylmethacrylate thin-films were extensively studied. Detailed studies showed that general significant shifts in the λmax of the absorption spectra of the open forms, interesting fatigue resistances and emission fluorescene properties were observed.