Enlightening Materials with Photoswitches

Advanced Materials, Journal Year: 2020, Volume and Issue: 32(20)

Published: Jan. 24, 2020

Incorporating molecular photoswitches into various materials provides unique opportunities for controlling their properties and functions with high spatiotemporal resolution using remote optical stimuli. The great largely still untapped potential of these photoresponsive systems has not yet been fully exploited due to the fundamental challenges in harnessing geometrical electronic changes on level modulate macroscopic bulk material properties. Herein, progress made during past decade field photoswitchable is highlighted. After pointing some general design principles, an increasing order integrated units are discussed, spanning range from amorphous settings over surfaces/interfaces supramolecular ensembles, liquid crystalline phases. Finally, future directions pointed out conclusion. In view exciting recent achievements field, emergence further development light-driven optically programmable (inter)active eagerly anticipated.

Language: Английский

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Beyond the Visible: Bioinspired Infrared Adaptive Materials

Advanced Materials, Journal Year: 2021, Volume and Issue: 33(14)

Published: Feb. 24, 2021

Abstract Infrared (IR) adaptation phenomena are ubiquitous in nature and biological systems. Taking inspiration from natural creatures, researchers have devoted extensive efforts for developing advanced IR adaptive materials exploring their applications areas of smart camouflage, thermal energy management, biomedical science, many other IR‐related technological fields. Herein, an up‐to‐date review is provided on the recent advancements bioinspired promising applications. First overview artificial technologies presented. Recent endeavors then introduced toward camouflage radiative cooling. According to Stefan‐Boltzmann law, can be realized by either emissivity engineering or cloaks. cooling maximize radiation object through atmospheric transparency window, thus holds great potential use energy‐efficient green buildings personal management advances emerging near‐IR (NIR) also discussed, including NIR‐triggered technologies, NIR light‐fueled soft robotics, light‐driven supramolecular nanosystems. This concludes with a perspective challenges opportunities future development materials.

Language: Английский

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Liquid Thermo-Responsive Smart Window Derived from Hydrogel

Joule, Journal Year: 2020, Volume and Issue: 4(11), P. 2458 - 2474

Published: Sept. 23, 2020

Language: Английский

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Carbon-based functional nanomaterials: Preparation, properties and applications

Composites Science and Technology, Journal Year: 2019, Volume and Issue: 179, P. 10 - 40

Published: April 26, 2019

Language: Английский

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Light-driven bimorph soft actuators: design, fabrication, and properties

Materials Horizons, Journal Year: 2020, Volume and Issue: 8(3), P. 728 - 757

Published: Oct. 27, 2020

This review provides an account of the state-of-the-art light-driven bimorph soft actuators from their fundamentals to emerging applications, as well new perspectives on future scope, opportunities, and challenges.

Language: Английский

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Advances in Application of Azobenzene as a Trigger in Biomedicine: Molecular Design and Spontaneous Assembly

Advanced Materials, Journal Year: 2021, Volume and Issue: 33(26)

Published: May 24, 2021

Abstract Azobenzene is a well‐known derivative of stimulus‐responsive molecular switches and has shown superior performance as functional material in biomedical applications. The results multiple studies have led to the development light/hypoxia‐responsive azobenzene for use. In recent years, long‐wavelength‐responsive been developed. Matching longer wavelength absorption hypoxia‐response characteristics switch unit bio‐optical window large effective stimulus response. addition, used hypoxia‐sensitive connector via biological cleavage under appropriate conditions. This resulted on/off state switching properties such pharmacology fluorescence activity. Herein, advances design fabrication trigger biomedicine are summarized.

Language: Английский

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Emerging flexible sensors based on nanomaterials: recent status and applications

Journal of Materials Chemistry A, Journal Year: 2020, Volume and Issue: 8(48), P. 25499 - 25527

Published: Jan. 1, 2020

The flexible materials, nanomaterials, and fabrication strategy of sensors with stretchable self-healing properties were reviewed.

Language: Английский

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Arylazopyrazoles for Long-Term Thermal Energy Storage and Optically Triggered Heat Release below 0 °C

Journal of the American Chemical Society, Journal Year: 2020, Volume and Issue: 142(19), P. 8688 - 8695

Published: April 22, 2020

Arylazopyrazole derivatives based on four core structures (4pzMe, 3pzH, 4pzH, and 4pzH-F2) functionalized with a dodecanoate group were demonstrated to store thermal energy in their metastable Z isomer liquid phase release the by optically triggered crystallization at -30 °C for first time. Three heat storage-release schemes discovered involving different activation methods (optical, thermal, or combined) generating liquid-state isomers capable of storing energy. Visible light irradiation induced selective via Z-to-E isomerization, latent stored was preserved longer than 2 weeks unless triggered. Up 92 kJ/mol compounds, demonstrating remarkable stability high temperatures liquid-phase below 0 °C.

Language: Английский

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Storing energy with molecular photoisomers

Joule, Journal Year: 2021, Volume and Issue: 5(12), P. 3116 - 3136

Published: Nov. 22, 2021

Some molecular photoisomers can be isomerized to a metastable high-energy state by exposure light. These molecules then thermally or catalytically converted back their initial state, releasing heat in the process. Such reversible photochemical process has been considered for developing solar thermal (MOST) systems. In this review, we introduce concept, criteria, and state-of-the-art of MOST systems, with an emphasis on three most promising systems: norbornadiene/quadricyclane, E/Z-azobenzene, dihydroazulene/vinylheptafulvene. After discussing fundamental working principles, focus design strategies improving energy storage performance, remaining challenges, potential areas. Finally, summarize current incorporation into functional devices conclude perspective challenges future directions.

Language: Английский

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Computational Design and Synthesis of a Deeply Red-Shifted and Bistable Azobenzene

Journal of the American Chemical Society, Journal Year: 2020, Volume and Issue: 142(14), P. 6538 - 6547

Published: March 24, 2020

We computationally dissected the electronic and geometrical influences of ortho-chlorinated azobenzenes on their photophysical properties. X-ray analysis provided insight that trans-tetra-ortho-chloro azobenzene is conformationally flexible thus subject to molecular motions. This allows photoswitch adopt a range red-shifted geometries, which account for extended n → π* band tails. On basis our results, we designed di-ortho-fluoro di-ortho-chloro (dfdc) computational evidence superiority this substitution pattern tetra-ortho-chloro azobenzene. Thereafter, synthesized dfdc by ortho-chlorination via 2-fold C–H activation experimentally confirmed its structural properties through UV–vis, NMR, analyses. The advantages include near-bistable isomers an increased separation bands between trans- cis-conformations, generation unusually high levels cis-isomer irradiation with green/yellow light as well red within biooptical window.

Language: Английский

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