Results 31 to 40 of about 21,611 (258)

Intraannular photoreactions in pseudo-geminally substituted [2.2]paracyclophanes

Beilstein Journal of Organic Chemistry, 2011
The photoisomerization of the pseudo-geminal tetraene 11 furnishes the cyclooctadiene derivatives 13 and 15 with a completely new type of molecular bridge for a [2.2]paracyclophane which promise many interesting novel applications; the same is true for ...
Henning Hopf, Vitaly Raev, Peter G. Jones   +2 more
doaj   +1 more source

Tyrosine 263 in Cyanobacterial Phytochrome Cph1 Optimizes Photochemistry at the prelumi-R→lumi-R Step [PDF]

, 2014
We report a low-temperature fluorescence spectroscopy study of the PAS-GAF-PHY sensory module of Cph1 phytochrome, its Y263F mutant (both with known 3D structures) as well as Y263H and Y263S to connect their photochemical parameters with intramolecular ...
Essen, Lars-Oliver, Feilke, Kathleen, Hughes, Jon, Kopycki, Jakub, Mailliet, Joel, Psakis, Georgios, Sineshchekov, Vitaly, Zeidler, Mathias   +7 more
core   +1 more source

Chloro- and Dichloro-methylsulfonyl Nitrenes: Spectroscopic Characterization, Photoisomerization, and Thermal Decomposition

Molecules, 2018
Chloro- and dichloro-methylsulfonyl nitrenes, CH2ClS(O)2N and CHCl2S(O)2N, have been generated from UV laser photolysis (193 and 266 nm) of the corresponding sulfonyl azides CH2ClS(O)2N3 and CHCl2S(O)2N3, respectively.
Yang Yang, Xianxu Chu, Yan Lu, Manabu Abe, Xiaoqing Zeng   +4 more
doaj   +1 more source

Photomechanical Solid Polymers: Model for Pressure and Strain Induced by Photoisomerization and Photo-Orientation

Applied Sciences, 2022
Photoactive polymers are important for fundamental studies and applications in several area of photonics such as data storage and holography and nonlinear optics and photomechanics.
Zouheir Sekkat
doaj   +1 more source

Phototriggered Morphological and Compositional Change of UGGAA Repeat RNA Foci by Photoswitchable RNA-Binding Ligand. [PDF]

Angew Chem Int Ed Engl
We here developed a molecular tool for the optical control of UGGAA repeat RNA foci, a pathological hallmark of spinocerebellar ataxia type 31 (SCA31). The photoswitchable RNA‐binding ligand enabled reversible control of the RNA foci. UV irradiation induced the growth of the RNA foci, while subsequent visible light irradiation dissolved the structure ...
Fujiwara Y, Shibata T, Dohno C.
europepmc   +3 more sources

Efficient light-induced phase transitions in halogen-bonded liquid crystals [PDF]

, 2016
Here, we present a new family of light-responsive, fluorinated supramolecular liquid crystals (LCs) showing efficient and reversible light-induced LC-to-isotropic phase transitions.
Fernandez-Palacio F., Ikkala O., Metrangolo P., Poutanen M., Priimagi A., Resnati G., Saccone M., Siiskonen A., Terraneo G.   +8 more
core   +1 more source

Effect of a =X-NH-Fragment, (X = C, N), on Z/E Isomerization and ON/OFF Functionality of Isatin Arylhydrazones, ((Arylamino)Methylene)Indolin-2-Ones and Their Anions

Molecules, 2020
The subject of this work was the study of thermally and photochemically stimulated Z ↔ E isomerization and hydrazo ↔ azo tautomerism of Z- and E-isomers of isatin arylhydrazones and ((arylamino)methylene)indolin-2-ones and their anions. Using NMR, UV-Vis
Pavol Tisovský, Klaudia Csicsai, Jana Donovalová, Róbert Šandrik, Róbert Sokolík, Anton Gáplovský   +5 more
doaj   +1 more source

Excited-State Dynamics of All the Mono-cis and the Major Di-cis Isomers of β-Apo-8′-Carotenal as Revealed by Femtosecond Time-Resolved Transient Absorption Spectroscopy

Molecules, 2023
Cis isomers of carotenoids play important roles in light harvesting and photoprotection in photosynthetic bacteria, such as the reaction center in purple bacteria and the photosynthetic apparatus in cyanobacteria.
Kota Horiuchi, Chiasa Uragami, Ruohan Tao, Daisuke Kosumi, Richard J. Cogdell, Hideki Hashimoto   +5 more
doaj   +1 more source

Feedback-Control of Photoresponsive Fluid Interfaces

, 2017
Photoresponsive surfactants provide a unique microfluidic driving mechanism. Since their molecular shapes change under illumination and thereby affect surface tension of fluid interfaces, Marangoni flow along the interface occurs.
Grawitter, Josua, Stark, Holger
core   +1 more source

Supramolecular hierarchy among halogen and hydrogen bond donors in light-induced surface patterning [PDF]

, 2015
Halogen bonding, a noncovalent interaction possessing several unique features compared to the more familiar hydrogen bonding, is emerging as a powerful tool in functional materials design.
Barrett C. J., Cavallo G., Dichiarante V., Forni A., Goulet-Hanssens A., Metrangolo P., Priimagi A., Resnati G., Saccone M., Terraneo G., Vapaavuori J.   +10 more
core   +1 more source