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- W4205125699 abstract "Diarylethene-functionalized liquid-crystalline elastomers (DAE-LCEs) containing thiol-anhydride bonds were prepared and shown to undergo reversible, reprogrammable photoinduced actuation. Upon exposure to UV light, a monodomain DAE-LCE generated 5.5 % strain. This photogenerated strain was demonstrated to be optically reversible over five cycles of alternating UV/Visible light exposure with minimal photochrome fatigue. The incorporation of thiol-anhydride dynamic bonds allowed for retention of actuated states. Further, re-programming of the nematic director was achieved by heating above the temperature for bond exchange to occur (70 °C) yet below the nematic-to-isotropic transition temperature (100 °C) such that order was maintained between mesogens. The observed thermal stability of each of the diarylethene isomers of over 72 h allowed for decoupling of photo-induced processes and polymer network effects, showing that both polymer relaxation and back-isomerization of the diarylethene contributed to LCE relaxation over a period of 12 hours after actuation unless bond exchange occurred." @default.
- W4205125699 created "2022-01-25" @default.
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- W4205125699 date "2022-01-25" @default.
- W4205125699 modified "2023-10-08" @default.
- W4205125699 title "Shape Permanence in Diarylethene‐Functionalized Liquid‐Crystal Elastomers Facilitated by Thiol‐Anhydride Dynamic Chemistry" @default.
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- W4205125699 doi "https://doi.org/10.1002/anie.202116522" @default.
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