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
A symmetrical azo-based fluorophore and the derived salen multipurpose framework for emissive layers
TL;DR: In this article, the authors synthesized compound A2, 4,4′-((1,1′)-(2,5-dimethoxy-1,4-phenylene)bis(diazene-2,1-diyl))dianiline and its symmetrical Schiff-base derivative C2.
Journal ArticleDOI
Monitoring Isomerization of Molecules in Solution Using Ion Mobility Mass Spectrometry.
TL;DR: An ion mobility spectrometer (IMS) with an electrospray ion source is used to investigate photo and thermal isomerization of photoactive molecules in the electrosPRay syringe, demonstrating a distinct advantage over UV-vis spectrophotometry for measuring isomer populations in situations where there are multiple isomers with overlapping absorption profiles.
Journal ArticleDOI
Metal-containing polymers as light-emitting and light-responsive materials and beyond
TL;DR: Examples of metal-containing polymers will be described demonstrating large potentialities of such systems for creating stimuli-responsive materials with special emphasis for those showing optical applications.
Journal ArticleDOI
Photochemical liquefaction and softening in molecular materials, polymers, and related compounds
TL;DR: A review of the recent developments on photo-induced liquefaction and softening of azobenzene-based materials can be found in this article, where the effect of the alkyl chain length, functional groups, and number of units on the photoinduced behavior have been extensively investigated.
Journal ArticleDOI
Aliphatic/aromatic spacers based azo dye dimers: synthesis and application for optical storage devices
TL;DR: The photoisomerization effect of new bent-shaped azo dyes in the presence of aliphatic and aromatic spacers is reported for the first time in this paper, where the synthesized compounds with n-hexane and benzene as central moieties were characterized by different spectral analytical techniques such as 1H-NMR, 13C- NMR, FTIR and UV-Vis.
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.
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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.