Chemistry Letters, Vol.31, No.6, 572-573, 2002
Thermal cycloreversion reaction of a photochromic dithienylperfluorocyclopentene with tert-butoxy substituents at the reactive carbons
tert-Butoxy groups were introduced at 2 and 2'-positions of the thiophene rings of a dithienylperfluorocyclopentene to prepare a photochromic compound with a thermal cycloreversion reactivity and a low photocycloreversion quantum yield. The cycloreversion quantum yield was similar to the isopropyl-substituted derivative and the half-life time of the colored isomer at 100 degreesC was 8 s.