Light-responsive azo-containing organogels.

Ayer, M A; Schrettl, S; Balog, S; Simon, Y C; Weder, C · Soft Matter · 2017

basic_science · Level V

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Abstract

While azo compounds are widely employed as radical initiators, they have rarely been used as stimuli-responsive motifs in macromolecular constructs. In this study, an azo-based cross-linker was prepared and reacted with poly(vinyl alcohol) to afford a series of stimuli-responsive organogels. Irradiation of these materials with UV light causes de-cross-linking and triggers a solid-to-liquid phase transition. Model adhesives with de-bonding-on-demand capability based on this design were explored.