Abstract
Polylysiloxane derivatives carrying a crowned azobenzene, that is, an azobenzene derivative with a crown ether moiety, at the side chain have been designed to enhance aggregation of the crowned azobenzene molecules. Crowned azobenzene polysiloxanes exhited a smectic liquid crystal phase, whereas their corresponding monomeric crowned azobenzenes did not. Polymer composite films containing one of the crowned azobenzene polysiloxanes and an alkali-metal salt underwent remarkable photoinduced ionic-conductivity switching, which is ascribable to structural changes in is highly-oriented side chains, induced by isomerization of is azobenzene moiety
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