Control of Imine Exchange Kinetics with Photoswitches to Modulate Self‐Healing in Polysiloxane Networks by Light Illumination |
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Authors: | Michael Kathan Dr Petr Kovaříček Christoph Jurissek Antti Senf Dr Andre Dallmann Andreas F Thünemann Prof Stefan Hecht |
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Institution: | 1. Department of Chemistry & IRIS Adlershof, Humboldt-Universit?t zu Berlin, Berlin, Germany;2. Federal Institute for Materials Research and Testing, Berlin, Germany |
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Abstract: | Various aldehyde‐containing photoswitches have been developed whose reactivity toward amines can be controlled externally. A thermally stable bifunctional diarylethene, which in its ring‐closed form exhibits imine formation accelerated by one order of magnitude, was used as a photoswitchable crosslinker and mixed with a commercially available amino‐functionalized polysiloxane to yield a rubbery material with viscoelastic and self‐healing properties that can be reversibly tuned by irradiation. |
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Keywords: | adaptive materials diarylethenes dynamic covalent chemistry photochromism self-healing |
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