Results 41 to 50 of about 5,917 (220)
Two-photon photopolymerization directly initiated by spiropyran photochromic molecules
Light: Advanced Manufacturing, 2023 Here, we report the ability of spiropyrans to initiate two-photon polymerization (TPP) for the first time in the literature. The comparison and synergies between the spiropyran photochromic molecule of interest, namely 6-nitro-BIPS, and well-known ...
Dandan Ge +7 more
doaj +1 more source
Designed Monomers and Polymers, 2020 1ʹ-(2-Acryloxyethyl)-3,3ʹ-dimethyl-6-nitrospiro[2 H-1-benzopyran-2,2ʹ-indoline] (SPA) was synthesized and grafted onto a water-soluble carboxymethyl chitin (CMCH) macromolecule to prepare a photochromic copolymer (CMCH-g-SPA). The structure of CMCH-g-SPA
Bin-Bin Sun +3 more
doaj +1 more source
Synthesis and characterisation of spiropyran-polymer brushes in micro-capillaries: towards an integrated optical sensor for continuous flow analysis [PDF]
, 2011 Fused silica-capillaries were successfully functionalised with spiropyran-polymer brushes using spiropyran functionalised norbornyl derivative as monomer. The polymerisation was achieved by surface-initiated ring- opening metathesis polymerisation.
Benito-Lopez, Fernando +3 more
core +1 more source
Spiropyran-based dynamic materials
Chem. Soc. Rev., 2014 In the past few years, spiropyran has emerged as the molecule-of-choice for the construction of novel dynamic materials. This unique molecular switch undergoes structural isomerisation in response to a variety of orthogonal stimuli, e.g. light, temperature, metal ions, redox potential, and mechanical stress.
openaire +3 more sources
Double-stranded RNA induction asa potential dynamic biomarkerfor DNA-demethylating agents
Molecular Therapy: Nucleic Acids, 2022 Hypomethylating agents (HMAs), such as azacitidine and decitabine, induce cancer cell death by demethylating DNAs to promote the expression of tumor-suppressor genes. HMAs also reactivate the transcription of endogenous double-stranded RNAs (dsRNAs) that
Minjeong Kang +14 more
doaj +1 more source
Eliminating Fatigue in Surface-Bound Spiropyrans [PDF]
The Journal of Physical Chemistry C, 2019 This paper describes an experimental approach to eliminating the loss of reversibility that surface-bound spiropyrans exhibit when switched with light. Although such fatigue can be controlled in other contexts, on surfaces, the photochromic compounds are held in close proximity to each other and relatively few molecules modulate the properties of a ...
Sumit Kumar +7 more
openaire +3 more sources
Light‐Controlled Reversible Coassembly of Hybrid Functional Nanostructures
Advanced Functional Materials, EarlyView.Light‐responsive hybrid nanostructures are formed by coassembling azobenzene‐ and PAH‐functionalized nanoparticles through reversible an tunable π interactions. The system enables tunable coupling between distinct components such as gold and magnetite or carbon nanotubes, producing switchable optical and magnetic properties under light and magnetic ...
Michal Sawczyk +5 more
wiley +1 more source
Photo-detection of solvent polarities using non-invasive coatings in capillaries [PDF]
, 2011 Fused silica-capillaries were functionalised with spiropyran-polymer brushes using a spiropyran functionalised norbornyl derivative as the monomer (SP-M).
Benito-Lopez, Fernando +3 more
core +1 more source
Photoswitching Conduction in Framework Materials
Advanced Functional Materials, EarlyView.This mini‐review summarizes recent advances in state‐of‐the‐art proton and electron conduction in framework materials that can be remotely and reversibly switched on and off by light. It discusses the various photoswitching conduction mechanisms and the strategies employed to enhance photoswitched conductivity.
Helmy Pacheco Hernandez +4 more
wiley +1 more source
Spiropyran Photoisomerization Dynamics in Multiresponsive Hydrogels
Journal of the American Chemical Society, 2021 Light-responsive, spiropyran-functionalized hydrogels have been used to create reversibly photoactuated structures for applications ranging from microfluidics to nonlinear optics. Tailoring a spiropyran-functionalized hydrogel system for a particular application requires an understanding of how co-monomer composition affects the switching dynamics of ...
Amos Meeks +4 more
openaire +2 more sources