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
Tuning azoheteroarene photoswitch performance through heteroaryl design
Joaquín Calbo,Claire E. Weston,Andrew J. P. White,Henry Rzepa,Julia Contreras-García,Matthew J. Fuchter +5 more
TL;DR: A systematic computational and experimental study is presented to elucidate the origin of the long thermal half-lives and excellent addressability of the arylazopyrazoles, and apply this understanding to determine important structure-property relationships for a wide array of comparable azoheteroaryl photoswitches.
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Multiple Anti‐Counterfeiting Guarantees from a Simple Tetraphenylethylene Derivative – High‐Contrasted and Multi‐State Mechanochromism and Photochromism
TL;DR: A novel tetraphenylethylene (TPE) derivative 1 was designed with an integration of aggregation-induced emission, multi-state mechanochromism and self-recovery photochromism to provide double enhancement of a multimode guarantee in advanced anti-counterfeiting.
Journal ArticleDOI
Carbon-based functional nanomaterials: Preparation, properties and applications
TL;DR: Carbon-based functional nanomaterials have attracted remarkable attention from the scientific community for their unique combinations of advantageous chemical and physical properties, such as superb electrical conductivity, excellent heat conductivities, chemical stability, advanced optical properties, and high mechanical strength as discussed by the authors.
Journal ArticleDOI
When 2D Materials Meet Molecules: Opportunities and Challenges of Hybrid Organic/Inorganic van der Waals Heterostructures
TL;DR: It is highlighted how molecular self-assembly at the surface of 2D materials can be mastered to achieve precise control over position and density of (molecular) functional groups, paving the way for a new class of hybrid functional materials whose final properties can be selected by careful molecular design.
Journal ArticleDOI
Tunable Visible and Near Infrared Photoswitches
James R. Hemmer,Saemi O. Poelma,Nicolas J. Treat,Zachariah A. Page,Neil D. Dolinski,Yvonne J. Diaz,Warren Tomlinson,Kyle D. Clark,Joseph P. Hooper,Craig J. Hawker,Javier Read de Alaniz +10 more
TL;DR: A class of tunable visible and near-infrared donor-acceptor Stenhouse adduct (DASA) photoswitches were efficiently synthesized in two to four steps from commercially available starting materials with minimal purification, yielding fully transparent, colorless solutions and films.
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.