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
The synthesis, self-assembly and pH-responsive fluorescence enhancement of an alternating amphiphilic copolymer with azobenzene pendants
TL;DR: In this paper, a novel alternating amphiphilic copolymer (AAC) P(EG4-a-NAzoOMe) with azobenzene pendants was synthesized through the azide-alkyne click reaction.
Journal ArticleDOI
Azoreductase-triggered fluorescent nanoprobe synthesized by RAFT-mediated polymerization-induced self-assembly for drug release
Yechun zhou,Zhe Wang,Wang Yuqing,Lishan Li,Nianchen Zhou,Yuanli Cai,Zhengbiao Zhang,Xiulin Zhu +7 more
TL;DR: A novel and efficient polymerization-induced self-assembly (PISA) strategy for fabricating polymeric nanovehicles to load drugs for triggered release and fluorescence detection based on a TPE (tetraphenylethylene)-azobenzene fluorescence probe sensitive to hypoxic microenvironments is reported.
Journal ArticleDOI
Novel photo-controllable third-order nonlinear optical (NLO) switches based on azobenzene derivatives
Qiong Xie,Zhichao Shao,Yujie Zhao,Linpo Yang,Qiong Wu,Wenjuan Xu,Kai Li,Yinglin Song,Hongwei Hou +8 more
TL;DR: In this paper, three new azobenzene-based photo-controllable third-order nonlinear optical (NLO) switches were designed and synthesized, which exhibit strong reverse saturation absorption (RSA) before UV light irradiation, after irradiated by 365'nm light for 1'min, strong self-focusing behaviors (positive refraction) are observed.
Journal ArticleDOI
Light-controlled macrocyclization of tetrathiafulvalene with azobenzene: designing an optoelectronic molecular switch.
TL;DR: DFT calculations show that the out-of-plane distortion of the TTF moiety in this macrocycle is responsible for the variation of its oxidation potential upon photoisomerization of the neighboring AB bridge.
Journal ArticleDOI
Molecular dynamics study of the controlled destabilization of an RNA hairpin structure by a covalently attached azobenzene switch.
TL;DR: The simulations are found to reproduce certain experimentally predicted trends for azobenzene-modified RNA; in particular, both trans and cis conformers have a destabilizing effect, significantly enhanced for the cis conformer, even though the latter tends to flip out of the double-stranded stem region.
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.