Photochromism of a Furylfulgide, 2-[1-(2,5-Dimethyl-3-furyl)ethylidene]-3-isopropylidenesuccinic Anhydride in Solvents and Polymer Films

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Abstract
The quantum yields of the photochromic reaction between (E)- and (Z)-2-[1-(2,5-dimethyl-3-furyl)ethylidene]-3-isopropylidenesuccinic anhydride and the cyclized valence isomer were determined in various solvents and polymers. In both media the ring-opening quantum yield (ΦCE) depended on the dielectric constant of the media. In some polymer films, ΦCE were larger, and the cyclization quantum yield (ΦEC) and olefinic isomerization quantum yields (ΦEZ) and (ΦZE) were smaller than those in the corresponding solvents.