Journal ArticleDOI
Photoisomerization in different classes of azobenzene
TLDR
This critical review details the studies completed to date on the 3 main classes of azobenzene derivatives and explains the mechanism behind the isomerization mechanism.Abstract:
Azobenzene undergoes trans → cisisomerization when irradiated with light tuned to an appropriate wavelength. The reverse cis →transisomerization can be driven by light or occurs thermally in the dark. Azobenzene's photochromatic properties make it an ideal component of numerous molecular devices and functional materials. Despite the abundance of application-driven research, azobenzene photochemistry and the isomerization mechanism remain topics of investigation. Additional substituents on the azobenzene ring system change the spectroscopic properties and isomerization mechanism. This critical review details the studies completed to date on the 3 main classes of azobenzene derivatives. Understanding the differences in photochemistry, which originate from substitution, is imperative in exploiting azobenzene in the desired applications.read more
Citations
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Journal ArticleDOI
Reversibly tuning hydrogel stiffness through photocontrolled dynamic covalent crosslinks
Joseph V. Accardo,Julia A. Kalow +1 more
TL;DR: By controlling the stability of dynamic covalent crosslinks with adjacent photoswitches, the stiffness of an adaptable hydrogel is tuned reversibly.
Journal ArticleDOI
Determining the Photoisomerization Quantum Yield of Photoswitchable Molecules in Solution and in the Solid State.
Kati Stranius,Karl Börjesson +1 more
TL;DR: This work shows how to determine the photoisomerization quantum yield in the solid state and in solution when taking thermal processes into account and allows for rapid and accurate determination of the isomerization process for this important class of molecules.
Journal ArticleDOI
Switching the Proton Conduction in Nanoporous, Crystalline Materials by Light.
Kai Müller,Julian Helfferich,Fangli Zhao,Rupal Verma,Anemar Bruno Kanj,Velimir Meded,David Bléger,Wolfgang Wenzel,Lars Heinke +8 more
TL;DR: It is foreseen that photoswitchable proton-conducting materials may find its application in advanced, remote-controllable chemical sensors, and a variety of devices based on the conductivity of protons or other charged molecules, which can be interfaced with biological systems.
Journal ArticleDOI
Aktivierung molekularer Schalter mit sichtbarem Licht
David Bléger,Stefan Hecht +1 more
TL;DR: Grundlegende Eigenschaften molekularer systeme durch Bestrahlung mit Licht zu beeinflussen, verspricht vielfaltige Moglichkeiten im Bereich der Material-and Biowissenschften.
Journal ArticleDOI
Light-enhanced liquid-phase exfoliation and current photoswitching in graphene–azobenzene composites
Markus Döbbelin,Artur Ciesielski,Sébastien Haar,Silvio Osella,Matteo Bruna,Andrea Minoia,Luca Grisanti,Thomas Mosciatti,Fanny Richard,Eko Adi Prasetyanto,Luisa De Cola,Vincenzo Palermo,Raffaello Mazzaro,Vittorio Morandi,Roberto Lazzaroni,Andrea C. Ferrari,David Beljonne,Paolo Samorì +17 more
TL;DR: It is shown that the large conformational change associated with the trans–cis photochemical isomerization of alkyl-substituted azobenzenes can be used to improve the efficiency of liquid-phase exfoliation of graphite, with the photochromic molecules acting as dispersion-stabilizing agents.
References
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Journal ArticleDOI
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TL;DR: It is shown that a single film of a liquid-crystal network containing an azobenzene chromophore can be repeatedly and precisely bent along any chosen direction by using linearly polarized light.
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Light-driven motion of liquids on a photoresponsive surface
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Journal ArticleDOI
Design and synthesis of chromophores and polymers for electro-optic and photorefractive applications
TL;DR: The ability of nonlinear optical materials to transmit, process and store information forms the basis of emerging optoelectronic and photonic technologies as discussed by the authors, where organic chromophore-containing polymers, in which the refractive index can be controlled by light or an electric field, are expected to play an important role.
Journal ArticleDOI
Ultrafast Dynamics of Photochromic Systems.
Naoto Tamai,Hiroshi Miyasaka +1 more
TL;DR: Reaction dynamics of the photochromic systems such as spiropyran, flugide and diarylethene derivatives in femto- to nano-second time region was reviewed and mechanisms of rapid reaction channels in various phases were discussed.