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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Stimuli-Responsive Materials for Tissue Engineering and Drug Delivery.
Sofia Municoy,Maria Inés Alvarez Echazú,Pablo Edmundo Antezana,Juan Manuel Galdopórpora,Christian Ezequiel Olivetti,Andrea Mathilde Mebert,Maria Lucia Foglia,María Victoria Tuttolomondo,Gisela Solange Alvarez,John G. Hardy,Martín F. Desimone +10 more
TL;DR: Smart materials as controlled drug release vehicles for tissue engineering are described, highlighting their potential for the delivery of precise quantities of drugs at specific locations and times promoting the controlled repair or remodeling of tissues.
Journal ArticleDOI
Efficient cycling utilization of solar-thermal energy for thermochromic displays with controllable heat output
Yang Weixiang,Yiyu Feng,Yiyu Feng,Si Qianyu,Yan Qinghai,Peng Long,Liqi Dong,Fu Linxia,Wei Feng +8 more
TL;DR: In this paper, the closed-cycle utilization of photo-thermal energy for thermochromic displays by optimizing the solid-state high-rate heat output of solar thermal storage (STS) films was investigated.
Journal ArticleDOI
NIR-triggered drug release from switchable rotaxane-functionalized silica-covered Au nanorods.
TL;DR: An NIR-triggered drug delivery system was developed by capping photo-switchable azobenzene-based rotaxane onto Au nanorod-mesoporous silica core-shell hybrids, showing significant drug spreading to the adjacent tissues.
Journal ArticleDOI
A Highly Efficient Near-Infrared-Emissive Copolymer With a N=N Double-Bond π-Conjugated System Based on a Fused Azobenzene-Boron Complex
TL;DR: It is proposed that N=N double bonds should be attractive and functional building blocks for designing π-conjugated materials.
Journal ArticleDOI
Palladium-Catalyzed Direct Ortho-Nitration of Azoarenes Using NO2 as Nitro Source
Jiawei Dong,Bo Jin,Peipei Sun +2 more
TL;DR: A palladium-catalyzed direct ortho-nitration reaction of azoarenes was developed in which NO2 was used as both nitro source and oxidant for the first time.
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.
Journal ArticleDOI
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.