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, crystal structure, spectroscopic, and photoreactive properties of a ruthenium(II)-mononitrosyl complex
Marine Tassé,Hasan Shamran Mohammed,Chloé Sabourdy,Sonia Mallet-Ladeira,Pascal G. Lacroix,Isabelle Malfant +5 more
TL;DR: A compound of formula [RuIICl(NO)(Cl-py)4]-PF6)2, in which Cl-py is the 4-chloropyridine, has been synthesized in four steps and fully characterized as discussed by the authors.
Journal ArticleDOI
Selective mercury(ii) detection in aqueous solutions upon the absorption changes corresponding to the transition moments polarized along the short axis of an azobenzene chemosensor
TL;DR: A completely water soluble azobenzene chemosensor 1 showed characteristic UV-Vis signal changes in the band around 240 nm for Hg2+ in wide pH ranges, which also showed good tolerance to various metal ions and photoirradiation.
Journal ArticleDOI
Mechanically mutable polymer enabled by light
TL;DR: In this paper , the photo-induced soft elastomer is presented, where a photo-evocable soft midblock of azopolymer and the glassy polystyrene domains act as elastic matrix and physical cross-linking junctions, respectively.
Journal ArticleDOI
From Monomers to Self-Assembled Monolayers: The Evolution of Molecular Mobility with Structural Confinements
Alexandre Dhotel,Alexandre Dhotel,Ziguang Chen,Jianing Sun,Boulos Youssef,Jean-Marc Saiter,Andreas Schönhals,Li Tan,Laurent Delbreilh +8 more
TL;DR: In this paper, the effect of structural constriction on molecular mobility was investigated by broadband dielectric spectroscopy (BDS) within three types of molecular arrangements: monomers, oligomers and self-assembled monolayers (SAMs).
Journal ArticleDOI
Bromine-terminated azobenzene liquid crystals
Sérgio Augusto Antunes Sanches,Wallison Chaves Costa,Ivan H. Bechtold,Renato A.P. Halfen,Aloir A. Merlo,Leandra Franciscato Campo +5 more
TL;DR: In this article, a series of liquid crystals of bromine-terminated azobenzene were synthesized and characterised, composed of a core, an alkyl chain and a flexible spacer with a bromi...
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.