Chemistry Letters, Vol.40, No.1, 93-95, 2011
Photochromism of a Diarylethene with Methoxymethyl Groups at Reactive Carbons: Thermal Irreversible Reaction of the Closed-ring Isomer
A photochromic diarylethene having methoxymethyl groups at the reactive carbons was synthesized, and the thermal stability of the closed-ring isomer was examined. The closed-ring isomer of the diarylethene caused both the thermal cycloreversion and a thermally irreversible reaction at 120 degrees C. The structure of the thermal product was determined by H-1 NMR, MS, and X-ray crystallographic analysis.