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 Halogen Bond
Gabriella Cavallo,Pierangelo Metrangolo,Pierangelo Metrangolo,Roberto Milani,Tullio Pilati,Arri Priimagi,Giuseppe Resnati,Giancarlo Terraneo +7 more
TL;DR: The specific advantages brought up by a design based on the use of the halogen bond will be demonstrated in quite different fields spanning from material sciences to biomolecular recognition and drug design.
Journal ArticleDOI
Artificial Molecular Machines
TL;DR: The latest generations of sophisticated synthetic molecular machine systems in which the controlled motion of subcomponents is used to perform complex tasks are discussed, paving the way to applications and the realization of a new era of “molecular nanotechnology”.
Journal ArticleDOI
Spiropyran-based dynamic materials
TL;DR: This review discusses the synthesis, switching conditions, and use of dynamic materials in which spiropyran has been attached to the surfaces of polymers, biomacromolecules, inorganic nanoparticles, as well as solid surfaces.
Journal ArticleDOI
Stimuli-responsive supramolecular polymeric materials.
TL;DR: This critical review of recent developments in supramolecular polymeric materials is addressed, which can respond to appropriate external stimuli at the fundamental level due to the existence of noncovalent interactions of the building blocks.
References
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Journal ArticleDOI
Light-activated ion channels for remote control of neuronal firing.
TL;DR: These synthetic photoisomerizable azobenzene-regulated K+ (SPARK) channels allow rapid, precise and reversible control over neuronal firing, with potential applications for dissecting neural circuits and controlling activity downstream from sites of neural damage or degeneration.
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A photorefractive polymer with high optical gain and diffraction efficiency near 100
TL;DR: In this article, the authors describe a polymer composite with excellent photorefractive properties, achieving a diffraction efficiency approaching 100% and a net two-beam coupling gain of more than 200 cm-1.
Journal ArticleDOI
Mechanical twisting of a guest by a photoresponsive host
TL;DR: This design concept, which significantly extends the successful coupling of motion beyond the intramolecular level seen in synthetic allosteric receptors, might allow for the remote control of molecular events in larger interlocked molecular systems.
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Stable polymeric materials for nonlinear optics: a review based on azobenzene systems
TL;DR: A brief survey of NLO polymeric materials based on azobenzene units and of high thermal and temporal stability can be found in this paper, where a wide range of additional applications of azobenene chromophore is summarized, including photorefractivity, all-optical poling, holographic surface relief gratings, photo-assisted poling and optical data storage based on photochromism.
Journal ArticleDOI
The Cis -form of Azobenzene
TL;DR: In this article, an apparent lack of reproducibility was traced to an increase both in the light absorption of standard solutions and in the concentration of saturated solutions, on exposure to light.