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
Visible‐Light‐Induced Electron Transport from Small to Large Nanoparticles in Bimodal Gold Nanoparticle‐Loaded Titanium(IV) Oxide
TL;DR: As a result of the enhancement of charge separation, BM-Au/TiO2 exhibits a high level of visible-light activity for the one-step synthesis of azobenzenes from nitrobenzenes at 25 °C with a yield greater than 95 % and a selectivity greater than 99 %.
Journal ArticleDOI
Conjugated polymers – Problems and promises
TL;DR: In this paper, the authors outline how the synthetic evolution of conjugated polymers has resulted in the aforementioned properties, among others, and how these materials have opened the door for many state-of-theart applications.
Journal ArticleDOI
Supramolecular design principles for efficient photoresponsive polymer–azobenzene complexes
TL;DR: In this paper, the advantages and disadvantages of three commonly used supramolecular design strategies: hydrogen, halogen, and ionic bonding are reviewed, and a compelling case for a paradigm shift from covalently functionalized side-chain polymers to supramolescular polymer-azobenzene complexes is made.
Journal ArticleDOI
UV-Light-Induced Vibrational Coherences: The Key to Understand Kasha Rule Violation in trans-Azobenzene
Artur Nenov,Rocio Borrego-Varillas,Aurelio Oriana,Lucia Ganzer,Francesco Segatta,Irene Conti,Javier Segarra-Martí,J. Omachi,Maurizio Dapor,Simone Taioli,Simone Taioli,Cristian Manzoni,Shaul Mukamel,Giulio Cerullo,Marco Garavelli +14 more
TL;DR: The lifetime of the ππ* state is resolved, whose decay within ca.
Journal ArticleDOI
Two-photon brightness of azobenzene photoswitches designed for glutamate receptor optogenetics
Elizabeth C. Carroll,Shai Berlin,Joshua Levitz,Michael A. Kienzler,Zhe Yuan,Dorte Madsen,Delmar S. Larsen,Ehud Y. Isacoff,Ehud Y. Isacoff +8 more
TL;DR: It is shown how MAGs can instead be photoswitched by two-photon absorption of near-infrared light, which penetrates deeper into tissue and makes second generation PTL-controlled receptors suitable for studies of intact neural circuits.
References
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Journal ArticleDOI
Photomechanics: directed bending of a polymer film by light.
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
TL;DR: The light-driven motion of a fluid substance in a surface-modified glass tube suggests potential applicability to microscale chemical process systems.
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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.