A Photoresponsive Smart Covalent Organic Framework

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Ordered -columnar structures found in covalent organic frameworks (COFs) render them attractive as smart materials. However, external-stimuli-responsive COFs have not been explored. Here we report the design and synthesis of a photoresponsive COF with anthracene units as the photoresponsive -building blocks. The COF is switchable upon photoirradiation to yield a concavo-convex polygon skeleton through the interlayer [4+4] cycloaddition of anthracene units stacked in the -columns. This cycloaddition reaction is thermally reversible; heating resets the anthracene layers and regenerates the COF. These external-stimuli-induced structural transformations are accompanied by profound changes in properties, including gas adsorption, -electronic function, and luminescence. The results suggest that COFs are useful for designing smart porous materials with properties that are controllable by external stimuli.
Publisher
WILEY-V C H VERLAG GMBH
Issue Date
2015-07
Language
English
Article Type
Article
Citation

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, v.54, no.30, pp.8704 - 8707

ISSN
1433-7851
DOI
10.1002/anie.201503902
URI
http://hdl.handle.net/10203/241602
Appears in Collection
CH-Journal Papers(저널논문)
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