Results 71 to 80 of about 6,678 (238)

Light‐controlled molecular tweezers capture specific amyloid oligomers

Aggregate
Amyloid‐β peptide (Aβ) oligomers, characteristic symptom of Alzheimer's disease (AD), have been identified as the most neurotoxic species and significant contributors to neurodegeneration in AD.
Chengyuan Qian, Jiefang Chen, Cheng Wang, Qiang Wang, Xiaoyong Wang, Xiaohui Wang   +5 more
doaj   +1 more source

Light-Driven Self-Pulsating Hydrogel with a Sliding-Delay Mechanism for Micro-Actuation and Microfluidic Applications

Micromachines
Light-responsive hydrogel-based oscillators typically exhibit small oscillation amplitudes because solvent diffusion is intrinsically slow, and their dependence on external periodic light modulation further results in limited amplitude, poor stability ...
Xingui Zhou, Huailei Peng, Yunlong Qiu, Cong Li   +3 more
doaj   +1 more source

Photochemical Е/Z isomerization of isonicotinoyl hydrazones based on pyridoxine derivatives

Учёные записки Казанского университета: Серия Естественные науки
Isonicotinoyl hydrazone of 6-carbaldehyde pyridoxine 1, existing as a mixture of E and Z isomers, is known to exhibit potent activity against drug-resistant strains of M. tuberculosis.
N. V. Shtyrlin, R. M. Khaziev, D. R. Islamov, Y. G. Shtyrlin   +3 more
doaj   +1 more source

alkene photoisomerization [PDF]

, 2014
Citation: 'alkene photoisomerization' in the IUPAC Compendium of Chemical Terminology, 3rd ed.; International Union of Pure and Applied Chemistry; 2006. Online version 3.0.1, 2019. 10.1351/goldbook.AT07320 • License: The IUPAC Gold Book is licensed under Creative Commons Attribution-ShareAlike CC BY-SA 4.0 International for individual terms.
openaire   +1 more source

Encoding and Encryption via Dual‐Wavelength 3D Digital Light Processing

Angewandte Chemie International Edition, EarlyView.
Multi‐wavelength 3D DLP printing enables information encoding that can be encrypted on demand by applying orthogonal stimuli within a single material to trigger complementary responses. The 405 nm LED of the printer fabricates complex 3D geometries, while the 365 nm LED activates spiropyrans photochromism to program information into the structure ...
Finn Kröger, Michał P. Świątek, Eva Blasco   +2 more
wiley   +1 more source

A Study on the Photoisomerization of (E)-Dehydrozingerone, Its (E)-(E)-C₂ Symmetric Dimer, and Their O-Methylated Derivatives

Molecules
In this study, UV-induced (E)-to-(Z) geometrical isomerizations of the curcumin degradation product (E)-dehydrozingerone, along with curcumin-inspired (E)-O-methylated dehydrozingerone and their corresponding C2-symmetric dimers, were investigated.
Maria Antonietta Dettori, Valeria Ugone, Davide Fabbri, Paola Carta   +3 more
doaj   +1 more source

History-dependent nano-photoisomerization by optical near-field in photochromic single crystals

Communications Materials
The history dependence of physical systems is promising for solving complex problems. To exploit spontaneous nanometre-scale optical memory for computation, the history dependence must be elucidated. Here, we demonstrate history-dependent or dynamic nano-
Yuji Arakawa, Kazuharu Uchiyama, Kingo Uchida, Makoto Naruse, Hirokazu Hori   +4 more
doaj   +1 more source

Photogenerated Oxetanes as a Gateway to Uphill Cyclopropanation

Angewandte Chemie International Edition, EarlyView.
An atom‐economical route to densely functionalized cyclopropanes from furans and photochemically activated aldehydes is enabled by a unique oxetane‐to‐cyclopropane rearrangement. These cyclopropanes can be used to access complex bioactive scaffolds and serve as a platform for asymmetric cyclopropane synthesis.
Tim Köglmeier, Thomas J. Tiefel, Oliver Reiser   +2 more
wiley   +1 more source

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

Synthesis and characterization of bis(4-amino-2-bromo-6-methoxy)azobenzene derivatives

Beilstein Journal of Organic Chemistry, 2019
Aminoazobenzene derivatives with four ortho substituents with respect to the N–N double bond are a relatively unexplored class of azo compounds that show promise for use as photoswitches in biology.
David Martínez-López, Amirhossein Babalhavaeji, Diego Sampedro, G. Andrew Woolley   +3 more
doaj   +1 more source