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
Reversible Photoswitching and Isomer-Dependent Diffusion of Single Azobenzene Tetramers on a Metal Surface.
TL;DR: The study of a three‐dimensional shape‐persistent molecular architecture consisting of four tetrahedrally arranged azobenzene units that is adsorbed on a Ag(111) surface suggests that molecular growth processes could be controlled by external stimuli.
Journal ArticleDOI
Simulation of the π→π∗ photodynamics of azobenzene: Decoherence and solvent effects
TL;DR: In this article, surface hopping simulations of the photodynamics of azobenzene excited in the π → π ∗ band, in vacuo and in two solvents of different viscosity are presented.
Journal ArticleDOI
Emergence of photoswitchable states in a graphene-azobenzene-Au platform.
E. Margapoti,Philipp Strobel,Mahmoud M. Asmar,Mahmoud M. Asmar,Max Seifert,Juan Li,Matthias Sachsenhauser,O. Ceylan,Carlos-Andres Palma,Johannes V. Barth,Jose A. Garrido,Anna Cattani-Scholz,Sergio E. Ulloa,Sergio E. Ulloa,Jonathan J. Finley +14 more
TL;DR: The observation of resonance states in photoswitchable self-assembled molecular(SAM)-graphene hybrid shows strong current resonances, the strength of which can be reversibly gated on- and off- by optically switching the molecular conformation of the mSAM.
Journal ArticleDOI
Synthetic Biological Approaches for Optogenetics and Tools for Transcriptional Light-Control in Bacteria.
TL;DR: The focus of this review shifts to transcriptional light regulators, which are presented in the biotechnologically highly relevant model organism Escherichia coli.
Journal ArticleDOI
Pyrazolylazophenyl Ether-Based Photoswitches: Facile Synthesis, (Near-)Quantitative Photoconversion, Long Thermal Half-Life, Easy Functionalization, and Versatile Applications in Light-Responsive Systems.
TL;DR: In this article, pyrazolylazophenyl ethers (pzAzo ethers) are introduced as a class of azo photoswitches that provides quantitative (>98 %) trans-cis photoisomerization (365 nm light), near-quantitative (95-96 %) reverse isomerization, and a long cis-isomer half-life of three months.
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.