Photoresponsive azobenzene polymers

Photoresponsive azobenzene polymers

Photoswitching of Glass Transition Temperatures of Azobenzene-Containing Polymers Induces Reversible Solid-to-Liquid Transitions

Hongwei Zhou, Changguo Xue, Philipp Weis, Yasuhito Suzuki, Shilin Huang, Kaloian Koynov, Günter K. Auernhammer, Rüdiger Berger, Hans-Jürgen Butt and Si Wu*

Nature Chemistry, 2017, 9, 145-151.

(a) Chemical structures and photoisomerization of azopolymers P1, P2, and P3. (b) Optical microscopy images of P1 powders before and after UV irradiation. Scale bars, 20 μm. (c) Schematic illustration and optical microscopy images of healing of scratches on P1 with light. Scale bars, 20 μm. (d)  Schematic illustration and confocal microscopy images show photoinduced reduction of surface roughness. (e) Schematic illustration and photographs of transfer printing based on the photoinduced solid-to-liquid transition. Zoom Image
(a) Chemical structures and photoisomerization of azopolymers P1, P2, and P3. (b) Optical microscopy images of P1 powders before and after UV irradiation. Scale bars, 20 μm. (c) Schematic illustration and optical microscopy images of healing of scratches on P1 with light. Scale bars, 20 μm. (d)  Schematic illustration and confocal microscopy images show photoinduced reduction of surface roughness. (e) Schematic illustration and photographs of transfer printing based on the photoinduced solid-to-liquid transition.

Photoinduced Liquefaction of Azobenzene-Containing Polymers

P. Weis, W. Tian*, S. Wu*

Chem. Eur. J., 2018, 24, 6494-6505. (Invited Minireview)

Reproduced with permission. Copyright 2018, WILEYVCH Verlag GmbH & Co. KGaA. Zoom Image

Reproduced with permission. Copyright 2018, WILEYVCH Verlag GmbH & Co. KGaA.

Spanning the Solar Spectrum: Azopolymer Solar Thermal Fuels for Simultaneous UV and Visible Light Storage

A. K. Saydjari, P. Weis, S. Wu

Adv. Energy Mater., 2017, 7, 1601622. (Cover)

Reproduced with permission. Copyright 2016, WILEY-VCH Verlag GmbH & Co. KGaA. Zoom Image

Reproduced with permission. Copyright 2016, WILEY-VCH Verlag GmbH & Co. KGaA.

Visible-Light-Responsive Azopolymers with Inhibited π-π Stacking Enable Fully Reversible Photopatterning

P. Weis, D. Wang, S. Wu

Macromolecules, 2016, 49, 6368-6373.

Reproduced with permission. Copyright 2016, American Chemical Society Zoom Image

Reproduced with permission. Copyright 2016, American Chemical Society

Light-Switchable Azobenzene-Containing Macromolecules: From UV to Near Infrared

P. Weis, S. Wu

Macromol. Rapid Commun., 2017, 2017, 1700220. (Invited Feature Article)

Reproduced with permission. Copyright 2017, WILEY-VCH Verlag GmbH & Co. KGaA. Zoom Image

Reproduced with permission. Copyright 2017, WILEY-VCH Verlag GmbH & Co. KGaA.

A solar actuator based on hydrogen-bonded azopolymers for electricity generation

Y. Xiong, L. Zhang, P. Weis, P. Naumov, S. Wu

J. Mater. Chem. A, 2018, 6, 3361-3366.

Reproduced with permission from the Royal Society of Chemistry. Zoom Image

Reproduced with permission from the Royal Society of Chemistry.

An autonomic self-healing organogel with a photo-mediated modulus

Y. Xiong, Z. Chen, H. Wang, L.-M. Ackermann, M. Klapper, H.-J. Butt, S. Wu

Chem. Commun., 2016, 52, 14157-14160.

Reproduced with permission from the Royal Society of Chemistry. Zoom Image

Reproduced with permission from the Royal Society of Chemistry.

Orthogonal Photo-switching of Supramolecular Patterned Surfaces

D. Wang, F. Schellenberger, J. T. Pham, H.-J. Butt, S. Wu

Chem. Commun., 2018, 54, 3403-3406.

Reproduced with permission from the Royal Society of Chemistry. Zoom Image

Reproduced with permission from the Royal Society of Chemistry.

A photoresponsive orthogonal supramolecular complex based on host-guest interactions

D. Wang, M. Wagner, A. K. Saydjari, J. Mueller, S. Winzen, H.-J. Butt, S. Wu

Chem. Eur. J., 2017, 23, 2628-2634.

Reproduced with permission. Copyright 2017, WILEY-VCH Verlag GmbH & Co. KGaA. Zoom Image

Reproduced with permission. Copyright 2017, WILEY-VCH Verlag GmbH & Co. KGaA.

Reversible Janus particle assembly via responsive host–guest interactions

Y. Zhou, D. Wang, S. Huang, G. Auernhammer, Y. He, H.-J. Butt and S. Wu*

Chem. Commun., 2015, 51, 2725-2727

Reversible assembly of Janus particles was manipulated by host–guest interaction of b-cyclodextrin (b-CD) and azobenzene. The formation of superstructures of Janus particles can be controlled light irradiation or adding chemicals. Zoom Image
Reversible assembly of Janus particles was manipulated by host–guest interaction of b-cyclodextrin (b-CD) and azobenzene. The formation of superstructures of Janus particles can be controlled light irradiation or adding chemicals.

Supramolecular hydrogels constructed by red-light-responsive host-guest interactions for photo-controlled protein release in deep tissue

D. Wang, M. Wagner, H.-J. Butt, S. Wu*

Soft Matter 2015, 11, 7656-7662

The tetra-ortho-methoxy-substituted azobenzene and β-cyclodextrin spontaneously formed a supramolecular complex. This new supramolecular interaction was used to construct red-light-responsive hydrogels. Zoom Image
The tetra-ortho-methoxy-substituted azobenzene and β-cyclodextrin spontaneously formed a supramolecular complex. This new supramolecular interaction was used to construct red-light-responsive hydrogels.

Red-Light-Responsive Supramolecular Valves for Photocontrolled Drug Release from Mesoporous Nanoparticles

D. Wang and S. Wu*

Langmuir, 2016, 32, 632-636

Supramolecular valves constructed by tetra-ortho-methoxy-substituted azobenzene and β-cyclodextrin were grafted on drug-loaded mesoporous silica nanoparticles. Red light was able to open the supramolecular valves and induce drug release even in deep tissue. Zoom Image
Supramolecular valves constructed by tetra-ortho-methoxy-substituted azobenzene and β-cyclodextrin were grafted on drug-loaded mesoporous silica nanoparticles. Red light was able to open the supramolecular valves and induce drug release even in deep tissue.
 
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