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Control of Imine Exchange Kinetics with Photoswitches to Modulate Self‐Healing in Polysiloxane Networks by Light Illumination
Author(s) -
Kathan Michael,
Kovaříček Petr,
Jurissek Christoph,
Senf Antti,
Dallmann Andre,
Thünemann Andreas F.,
Hecht Stefan
Publication year - 2016
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201605311
Subject(s) - diarylethene , imine , bifunctional , kinetics , photoswitch , photochromism , irradiation , photochemistry , materials science , azobenzene , yield (engineering) , chemistry , polymer chemistry , organic chemistry , polymer , catalysis , composite material , physics , quantum mechanics , nuclear physics
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.