Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 60, Issue 49, Pages 25872-25877Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.202108745
Keywords
azo compounds; nanostructures; photo-responsiveness; self-assembly; supramolecular polymers
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Funding
- Swiss National Foundation [200020_188468]
- Microscopy Imaging Center (MIC), University of Bern, Switzerland
- Universitat Bern
- Swiss National Science Foundation (SNF) [200020_188468] Funding Source: Swiss National Science Foundation (SNF)
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The amphiphilic phosphodiester-linked azobenzene trimer can self-assemble into different supramolecular structures in aqueous medium and can be switched by photoirradiation. These findings offer new possibilities for the development of smart functional materials.
An amphiphilic phosphodiester-linked azobenzene trimer has been exploited in the development of stimuli-responsive, water-soluble supramolecular polymers. The trimer can reversibly undergo thermal and photoisomerization between Z- and E-isomers. Its self-assembly properties in aqueous medium have been investigated by spectroscopic and microscopic techniques, demonstrating that E- and Z-azobenzene trimers form supramolecular nanosheets and toroidal nanostructures, respectively. By virtue of the E/Z photoisomerization of the azobenzene units, the two different supramolecular morphologies can be switched by photoirradiation. The findings pave a way towards stimuli-responsive, water-soluble supramolecular polymers which hold great promise in the development of smart functional materials.
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