Abstract
A new unsymmetrical photochromic diarylethene 1o, which contains condensed nucleus was synthesized. Its photochromic both in hexane solution and in PMMA film and kinetics experiment were investigated in detail. The result indicated that this diarylethene had reversible photochromism, changing the color from colorless to purple both in hexane solution and in PMMA film upon appropriate irradiation with 297 nm UV light. What’s more, the kinetic experiments showed that the cyclization and cycloreversion processes were zeroth and first order reaction, respectively. This new photochromic system also exhibited fluorescence switching in hexane solution and in PMMA film.
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