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
Regulating Fibroblast Shape and Mechanics through Photoresponsive Surfaces with Concentric Circular Topographic Patterns
Lucia Rossano,Lucia Rossano,Chiara Cimmino,Chiara Cimmino,Silvia Cavalli,Maurizio Ventre,Maurizio Ventre,Paolo A. Netti,Paolo A. Netti +8 more
TL;DR: The reported method is useful to manipulate cell shape and mechanics in a facile and cost‐effective manner and most importantly enables investigate mechanotransduction events dynamically.
Journal ArticleDOI
In Situ Switching of Site-Selectivity with Light in the Acetylation of Sugars with Azopeptide Catalysts.
Dominik Niedek,Frederik R. Erb,Christopher Topp,Alexander Seitz,Raffael C. Wende,André K. Eckhardt,Jonas Kind,Dominik Herold,Christina M. Thiele,Peter R. Schreiner +9 more
TL;DR: A novel concept for the in situ control of site-selectivity of catalytic acetylations of partially protected sugars based on light as external stimulus using oligopeptide catalysts equipped with an azobenzene moiety is presented.
Journal ArticleDOI
Pyrene–Azobenzene Dyads and Their Photochemistry
Olaf Nachtigall,Reiner Lomoth,Christian Dahlstrand,Anna Lundstedt,Adolf Gogoll,Matthew J. Webb,Helena Grennberg +6 more
TL;DR: The facile synthesis of three new folding azobenzene-pyrene systems 1−3, connected together by a serendipitously obtained and unpredicted ester linkage, is reported in this paper.
Journal ArticleDOI
Theoretical Designs of Photoresponsive Energy-Storage Materials Based on Attachment of π-Conjugated Molecules onto Sulfur-Doped Graphene
TL;DR: In this article, density functional theory calculations with long-range van der Waals effects (vdW-DF2) were performed to study the electronic structures and energy storage/release of graphene through sulfur (S)-doping and physisorption of π-conjugated photoresponsive molecules, trans/cis-azobenzene (AB) derivatives with an electron-donating substituent group, respectively.
Journal ArticleDOI
Recent Advances in Stimuli-Responsive DNA-Based Hydrogels.
Chen Wang,Junji Zhang +1 more
TL;DR: A variety of chemically and physically triggered DNA-based stimuli-responsive hydrogels and their versatile applications in biosensing, biocatalysis, cell culture and separation, drug delivery, shape memory, self-healing, and robotic actuators are summarized.
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.