Draper, Emily R., Schweins, Ralf, Akhtar, Riaz et al. (4 more authors) (2016) Reversible Photoreduction as a Trigger for Photoresponsive Gels. Chemistry of Materials. pp. 6336-6341. ISSN 1520-5002
Abstract
We present here a new type of photoresponsive, reversible low molecular weight gel. All previous examples rely on a photoisomerisation, ring-closing or dimerization. We show that photoreduction of a perylene bisimide gelator results in the formation of a stable radical anion. The formation of the radical anion results in a change in the packing of the perylene bisimides in the self-assembled aggregates, leading to a change in fibrous network and an increase in the rheological properties of the gels. An increase in the rheological properties is extremely rare for a photoresponsive gel; normally, irradiation results in a gel-to-sol transition, and the gel falling apart. As the radical anion decays, which takes several hours in air, the original gel properties are restored. This photoreduction can be cycled many times. Finally, we show that the mechanical properties are different between irradiated and nonirradiated sections in a patterned gel.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2016 American Chemical Society |
Dates: |
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Institution: | The University of York |
Academic Units: | The University of York > Faculty of Sciences (York) > Chemistry (York) |
Depositing User: | Pure (York) |
Date Deposited: | 27 Sep 2016 11:57 |
Last Modified: | 21 Oct 2024 23:51 |
Published Version: | https://doi.org/10.1021/acs.chemmater.6b02677 |
Status: | Published |
Refereed: | Yes |
Identification Number: | 10.1021/acs.chemmater.6b02677 |
Related URLs: | |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:105278 |