Results 51 to 60 of about 1,716 (161)

Transition-metal-free/boric acid catalysed mechanochemical synthesis of symmetrical and unsymmetrical azobenzenes: a sustainable approach [PDF]

RSC Mechanochemistry
A mechanochemical protocol employing boric acid, an economical and environmentally benign inorganic acid catalyst, enables the synthesis of symmetrical and unsymmetrical azobenzenes from diverse amines. This grinding-based, solvent-free approach provides
Tandra Kundu, Saptadwipa Bhattacharjee, Gyan Chandra Pariyar, Bijeta Mitra, Pranab Ghosh   +4 more
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Photo-induced deformations in azobenzene-containing side-chain polymers: molecular dynamics study

Condensed Matter Physics, 2006
We perform molecular dynamics simulations of azobenzene containing side-chain liquid crystalline polymer subject to an external model field that mimicks the reorientations of the azobenzenes upon irradiation with polarized light. The smectic phase of the
J.Ilnytskyi, M.Saphiannikova, D.Neher
doaj   +1 more source

Synthesis of CF₃-Indazoles via Rh(III)-Catalyzed C-H [4+1] Annulation of Azobenzenes with CF₃-Imidoyl Sulfoxonium Ylides

Molecules
An efficient Rh(III)-catalyzed C-H activation of azobenzenes and subsequent [4+1] cascade annulation with CF3-imidoyl sulfoxonium ylides was developed, yielding diverse CF3-indazoles.
Yilong Shang, Chen Li, Guiqiu Wang, Guiwei Yao, Hongliang Wu, Xun Chen, Ruirui Zhai   +6 more
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Electron attachment to trans-azobenzene

Physical Chemistry Chemical Physics, 2009
The temporary anion states of gas-phase trans-azobenzene are characterised by means of electron transmission spectroscopy (ETS) in the 0-6 eV range. The measured energies of vertical electron attachment are compared with the energies of the pi* virtual orbitals of the neutral molecule supplied by HF (at MP2 optimized geometries) and B3LYP calculations.
MODELLI, ALBERTO, P. D. Burrow
openaire   +3 more sources

Bistable Dual‐Responsive Azobenzene‐co‐PNIPAM Soft Microactuators via Two‐Photon Direct Laser Writing

Advanced Intelligent Systems
Miniaturized bistable actuators are of notable relevance for applications in microfluidics or the manipulation of delicate objects. Many applications require actuators to be multistable, meaning that they can hold specific positions without continuous ...
Chantal Barwig, Ruchira Colaco, Alina‐Sophie Koch, Sophie Geiger, Ernest R. Curticean, Irene Wacker, Zhe Wang, Målin Schmidt, Annabelle Sonn, Sadaf Pashapour, Fereydoon Taheri, Rasmus R. Schröder, Anne Staubitz, Christine Selhuber‐Unkel   +13 more
doaj   +1 more source

Diazocine-functionalized TATA platforms

Beilstein Journal of Organic Chemistry, 2019
Recently, it has been shown that the thermochemical cis→trans isomerization of azobenzenes is accelerated by a factor of more than 1000 by electronic coupling to a gold surface via a conjugated system with 11 bonds and a distance of 14 Å.
Roland Löw, Talina Rusch, Fynn Röhricht, Olaf Magnussen, Rainer Herges   +4 more
doaj   +1 more source

Selective switching of multiple azobenzenes

Chemical Science, 2019
Multi-state photoswitchable compounds are highly attractive for application in data storage or multi-responsive materials. Herein, a trisazobenzene macrocycle is presented, which can be switched selectively into three individual states.
Andreas H. Heindl, Jonathan Becker, Hermann A. Wegner   +2 more
openaire   +3 more sources

Modeling of Azobenzene-Based Compounds

Physical Sciences Reviews, 2017
AbstractAzobenzene is by far the most studied photochromic molecule and its applications range from optical storage to bio-engineering. To exploit the great potential of azobenzene, one must achieve deep understanding of its photochemistry as single molecule in solution AS WELL AS in-chain moiety and pendent group in macromolecular structures. With the
Marturano V., Ambrogi V., Bandeira N. A. G., Tylkowski B., Giamberini M., Cerruti P.   +5 more
openaire   +4 more sources

The absorption spectrum of cis-azobenzene

Photochemical & Photobiological Sciences, 2017
Azobenzene is a prototypical photochromic molecule existing in two isomeric forms, which has numerous photochemical applications that rely on a precise knowledge of the molar absorption coefficients (ε). Careful analysis revealed that the previously reported absorption spectra of the "pure" isomers were in fact mutually contaminated by small amounts of
Ľubica, Vetráková, Vít, Ladányi, Jamaludin, Al Anshori, Pavel, Dvořák, Jakob, Wirz, Dominik, Heger   +5 more
openaire   +2 more sources

Synthesis of N-acetyl diazocine derivatives via cross-coupling reaction

Beilstein Journal of Organic Chemistry
Diazocines are photoswitches derived from azobenzenes by bridging the two phenyl rings in ortho position with a CH2CH2 group forming an eight membered (diazocine) ring.
Thomas Brandt, Pascal Lentes, Jeremy Rudtke, Michael Hösgen, Christian Näther, Rainer Herges   +5 more
doaj   +1 more source