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
Synthesis of Phenolic Compounds via Palladium Catalyzed C-H Functionalization of Arenes.
TL;DR: This short review summarizes recent advances on palladium-catalyzed C-O bond forming reactions that enable direct access to phenolic compounds.
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Can nitro groups really anchor onto TiO2? Case study of dye-to-TiO2 adsorption using azo dyes with NO2 substituents
TL;DR: A computational study on a family of azo dyes bearing a nitro group shows weak, but non-negligible, adsorption onto TiO2; yet, very low photovoltaic performance once incorporated into a DSSC device.
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Probing the dynamic self-assembly behaviour of photoswitchable wormlike micelles in real-time
TL;DR: This is the first time the degree of AzoPS photoisomerisation has been tracked in situ through combined UV-Vis absorption spectroscopy-SANS measurements, and this technique could be widely used to gain mechanistic and kinetic insights into light-dependent processes that are reliant on self-assembly.
Journal ArticleDOI
Solid-state high-power photo heat output of 4-((3,5-dimethoxyaniline)-diazenyl)-2- imidazole/graphene film for thermally controllable dual data encoding/reading
TL;DR: In this paper, an imidazole-containing azoheteroarene (i-Azo-h) is introduced into a graphene-templated assembly for low-temperature time-resolved heat release.
Journal ArticleDOI
Synthesis, structure and optical data storage properties of silver nanoparticles modified with azobenzene thiols
TL;DR: In this article, photoisomerization behavior of azobenzene thiol ligands has been investigated through UV-vis spectroscopy, showing strong interaction of azo chromophores with surface plasmons of Ag nanoparticles in particular when the absorption bands are overlapped with each other.
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.