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
Orchestrating Molecular Motion with Light – From Single (macro)Molecules to Materials
TL;DR: In this paper, the intrinsic properties of azobenzene photoswitches are optimized, as well as their integration into oligomers, polymers, and 3D frameworks, and recent advances in that direction are highlighted.
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Peptide-anchored gold nanoparticles with bicatalytic sites for photo-switchable cascade catalysis
TL;DR: In this paper, a peptide-anchored gold nanoparticle cascade catalyst self-assembles by host-guest (cyclodextrin-azobenzene) interaction and catalyzes the reduction of 4-nitrophenyl acetate to 4-aminophenol.
Journal ArticleDOI
Photocontrol over Molecular Shape: Synthesis and Photochemical Evaluation of Glycoazobenzene Macrocycles
TL;DR: The first carbohydrate-based macrocycles comprising a photoresponsive azobenzene hinge, and a tremendous change in chirality upon photoisomerization, highlight the applicability of the new macrocycles as chiroptical molecular switches.
Journal ArticleDOI
Visible‐Light Switching of Metallosupramolecular Assemblies**
TL;DR: In this paper , a photoswitchable ligand and palladium(II) ions form a dynamic mixture of self-assembled metallosupramolecular structures, which can be reversibly pumped to a kinetic trap by small perturbations of the isomer distribution using non-destructive visible light.
Journal ArticleDOI
From Light Absorption to Cyclization: Structure and Solvent Effects in Donor-Acceptor Stenhouse Adducts
TL;DR: In this article, the authors proposed a complete computational study of the switching mechanism by means of TD-DFT and CASPT2/CASSCF calculations, leading to a previously unknown general scenario with common features for different DASAs, whose topology and relative energy is investigated based on different solvents and acceptor moieties.
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.