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
Azobenzenes and catalysis
Estelle Léonard,Floriane Mangin,Carole Villette,Muriel Billamboz,Christophe Len,Christophe Len +5 more
TL;DR: A global overview of the main access to the diazo compounds from 2010 as well as their use as a reactant or a promoter in organometallic catalysis can be found in this article.
Journal ArticleDOI
Switching by Photochemical trans–cis Isomerization of Azobenzene Substituents in Organoplatinum Complexes
TL;DR: In this article, a diimine ligand, LL = 2-C5H4NCHN-4-C6H4NsNPh, which carries a trans-azobenzene substituent, forms the dimethylplatinum(II) complex (PtMe2(LL)), which undergoes trans oxidative addition with MeI, PhCH2Br, Br2, and I2 to give the corresponding organoplatinum(IV) complexes (PtiIMe3(LL), (PtpBrMe
Journal ArticleDOI
Photosensitive chiral self-assembling materials: significant effects of small lateral substituents
Martin Cigl,Martin Cigl,Alexej Bubnov,Miroslav Kašpar,František Hampl,Věra Hamplová,O. Pacherova,Jiří Svoboda +7 more
TL;DR: In this article, small lateral substituents were introduced into the azobenzene core in the proximity of the azo group, and the influence of lateral substitution on the kinetics of the Z-E isomerization, mesomorphic behavior, and UV-Vis absorption spectra was studied.
Journal ArticleDOI
Synthesis and self-assembly of photoresponsive and luminescent polycatenar liquid crystals incorporating an azobenzene unit interconnecting two 1,3,4-thiadiazoles
TL;DR: In this paper, two 1,3,4thiadiazole rings interconnected by an azobenzene central linkage have been synthesized and investigated by polarizing microscopy, DSC, X-ray scattering, SEM, UV-vis spectroscopy and photoluminescence measurements.
PatentDOI
Controlling the isomerization rate of azo-bf2 switches using aggregation
TL;DR: A novel visible-light activated azo-BF2 switch possessing a phenanthridinyl π-system has been synthesized, and its switching properties have been characterized as a function of concentration.
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.