Results 21 to 30 of about 346 (146)

Novel Indoline Spiropyrans Based on Human Hormones β-Estradiol and Estrone: Synthesis, Structure, Chromogenic and Cytotoxic Properties

Molecules, 2023
The introduction of a switchable function into the structure of a bioactive compound can endow it with unique capabilities for regulating biological activity under the influence of various types of external stimuli, which makes such hybrid compounds ...
Ilya V. Ozhogin, Artem D. Pugachev, Nadezhda I. Makarova, Anna A. Belanova, Anastasia S. Kozlenko, Irina A. Rostovtseva, Peter V. Zolotukhin, Oleg P. Demidov, Islam M. El-Sewify, Gennady S. Borodkin, Anatoly V. Metelitsa, Boris S. Lukyanov   +11 more
doaj   +1 more source

Acidochromism of donor–acceptor Stenhouse adducts in organic solvent

Chemical Communications, 2022
First generation DASA derivatives can be reversibly isomerized upon protonation, thus behaving as acidochromic compounds in halogenated organic solvent.
Antonio Fiorentino, Brian Sachini, Stefano Corra, Alberto Credi, Cristina Femoni, Aurore Fraix, Serena Silvi   +6 more
openaire   +3 more sources

Sensitivity of the phenoxy derivatives of 2,4-dihydro-5H-[1,2,3]triazolo[4,5-d]pyrimidin-5-ones to acidic and basic stimuli [PDF]

, 2021
Herein we report the research on the sensitivity of six hydroxy derivatives of dihydrotriazolopyrimidines (HO-DTP) to acids and bases. The UV/Vis and fluorescence spectra of these compounds were investigated with the addition of the acids and bases ...
Belskaya, Nataliya P., Eltyshev, Alexander K.   +1 more
core   +3 more sources

Acidochromic spiropyran–merocyanine stabilisation in the solid state [PDF]

Acta Crystallographica Section A Foundations and Advances, 2018
Stabilizing the open-ring merocyanine form of a spiropyran compound based on co-crystallisation with inorganic acids.
Vanessa Kristina Seiler, Kevin Callebaut, Koen Robeyns, Nikolay Tumanov, Johan Wouters, Benoît Champagne, Tom Leyssens   +6 more
openaire   +2 more sources

Acidochromic Behavior of Dibenzylidene Cyclohexanone-Based Bischalcone: Experimental and Theoretical Study. [PDF]

ACS Omega, 2020
Synthesis and characterization of substituted 2,6-dibenzylidene cyclohexanone-based bischalcone derivatives and their optimized geometries were investigated by density functional theory. The synthesized compounds were identified through ultraviolet-visible, Fourier transform infrared, and 1H nuclear magnetic resonance spectroscopies and elemental ...
Badal MMR, Ashekul Islam HM, Maniruzzaman M, Abu Yousuf M.   +3 more
europepmc   +5 more sources

Photomechanical effects of acidochromic diarylethene derivatives [PDF]

SCIENTIA SINICA Chimica, 2019
Naphthalenylvinylbenzoxazol BO1N4F and naphthalenylvinylbenzothiazole BT1N4F have been synthesized, and led to topo-photochemical reactions. Compared with BT1N4F , the dimerization efficiency of BO1N4F is so high that more stress is yielded in the crystals during [2+2] cycloaddition reaction.
Jiang Peng, Kaiqi Ye, Yuan Yue, Cheng Liu, Jingbo Sun, Ran Lu   +5 more
openaire   +1 more source

Flexible Fibrous Visible Light Sensors Based on Spiropyran for Wearable Devices, Electronic Skins, and Thermal Management Fabrics. [PDF]

Small Sci
Flexible fibrous visible light sensors with a core‐sheath structure are prepared using a spiropyran (SP)/FeCl3·6H2O methyl cyanide aqueous solution and silicon rubber hollow fibers as the core and outer layers. These sensors are woven into fabrics with multiple functions, such as sensing and locating visible light, reversible photochromism, and thermal
Dang G, Chen K, Luo Y, Hu R, Huang Y, Tang H, Huang B, Sun J, Liu X, Wu Y, Fan L, Wu Q, Gan F.   +12 more
europepmc   +2 more sources

Perylene-Based Covalent Organic Frameworks for Acid Vapor Sensing. [PDF]

, 2019
Traditionally, the properties and functions of covalent organic frameworks (COFs) are defined by their constituting building blocks, while the chemical bonds that connect the individual subunits have not attracted much attention as functional components ...
Ascherl, Laura, Auras, Florian, Bein, Thomas, Bessinger, Derya, Evans, Emrys W, Friend, Richard H, Gorman, Jeffrey, Orsborne, Sarah   +7 more
core   +1 more source

Multi‐responsive Electropolymer Surface Coatings Based on Azo Molecular Switches and Carbazoles: Light, pH, and Electrochemical Control of Z→E Isomerization in Thin Films

Chemistry – A European Journal, Volume 29, Issue 63, November 13, 2023., 2023
Oxidative electropolymerization of bis‐carbazole containing azo monomers is a facile approach for preparing light‐responsive azo‐based surface coatings. The formed stable films retain the photochemical properties and pH sensitivity of the azo molecular switches and demonstrate electrocatalytic control over Z→E azo bond isomerization.
Anna Gibalova, Luuk Kortekaas, Julian Simke, Bart Jan Ravoo   +3 more
wiley   +1 more source

Photoresponsive Spiropyran and DEGMA‐Based Copolymers with Photo‐Switchable Glass Transition Temperatures

Macromolecular Rapid Communications, Volume 44, Issue 19, October 2023., 2023
Novel photoresponsive spiropyran (SP)‐based P(DEGMA‐co‐SpMA) copolymers with variable SP composition are synthesized and are found to exhibit reversible photoisomerism, photoswitchable glass transition temperature (Tg), high thermal stability, instant photochromism, and fluorescence on UV exposure. The elevation in Tg on irradiation of UV is attributed
Vaishali Pruthi, Yosuke Akae, Patrick Théato   +2 more
wiley   +1 more source