Synthesis, Photochromic Properties of an Unsymmetrical Diarylethene Bearing Fluorene Ring

A new unsymmetrical photochromic diarylethene compound was synthesized and its photochemical, fluorescence properties were investigated in detail in solution. The results showed that the compound exhibited remarkable photochromism and the emission intensity was quenched 87% at the photostationary state in solution. When the concentration arrived at 2 × 10-5 mol L-1, the fluorescence peak of the diarylethene had the maximum.