Diarylethene-based photochromic rewritable optical storage media for short-wavelength recording

Two non-symmetric perfluorocyclopentene derivatives have been synthesized. The absorption bands of their closed forms are located at 400 to approximately 500 nm wavelength regions. They undergo thermally irreversible photochromic reaction and fatigue resistant. The closed-ring form remains thermally stable after several months. And the repeatable cycle number in hexane is more than 10 3 times in the presence of air. It demonstrates that they are promising candidates for short wavelength recording.