Gated photochromism of 1,2-diarylethenes.
A dithienylethene derivative containing a cyclobutene-1,2-dione skeleton does not exhibit photochromic properties. However, when both ketone functions are protected with cyclic acetal groups, photochromic behavior is observed.
Kühni
Joël
J
Department of Chemistry, University of Fribourg, Chemin du Musée 9, Fribourg, Switzerland.
Belser
Peter
P