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
Excited state non-adiabatic dynamics of large photoswitchable molecules using a chemically transferable machine learning potential
TL;DR: In this article , a diabatic artificial neural network (DANN) was proposed to accelerate reactive simulations for azobenzene derivatives to accelerate the detection of photowitches with desired photophysical properties.
Journal ArticleDOI
A study of diazonium couplings with aromatic nucleophiles both in solution and on a polymer surface
TL;DR: In this article, a detailed examination of solution and surface processes was warranted, and results of such a study were reported, and the modification of polystyrene surfaces was examined as a model, and compared to a solution mimic using N,N-dimethylaniline.
Journal ArticleDOI
Light, temperature, and pH control of aqueous azopyridine-terminated poly(N-isopropylacrylamide) solutions
TL;DR: In this article, the phase transition of aqueous solutions of α-azopyridine-ω-n-dodecyl-poly(N-isopropylacrylamides) (C12-PN-AzPy) with the molar mass (Mn) ranging from 5800 to 19 700 g mol−1.
Journal ArticleDOI
Two-dimensional supramolecular spring: coordination driven reversible extension and contraction of bridged half rings
TL;DR: A coordination-controlled reversible assembly reveals supramolecular springs in response to chemical stimuli, which is of great interest in bionics and materials science.
Journal ArticleDOI
Linear and Third-Order Nonlinear Optical Properties of Triazobenzene-1,3,5-triazinane-2,4,6-trione (Isocyanurate) Derivatives.
Ziemowit Pokladek,Marta K. Dudek,Olivier Mongin,Rémi Métivier,Piotr Młynarz,Marek Samoc,Katarzyna Matczyszyn,Frédéric Paul +7 more
TL;DR: It is shown that mixtures that contain increased contents of cis-azo isomers can be reversibly generated upon photoirradiation at specific wavelengths from the most stable all-trans isomers with X=NO2 and H, and 2-X derivatives are two-photon absorbers, indicating that trans-to-cis isomerization might be achievable by two-Photon excitation.
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.
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.