Results 41 to 50 of about 21,611 (258)

The Effect of Photoisomerization on the Antioxidant Properties of Sinapic Acid and Methyl Sinapate in Different Solvents: A DFT/TD-DFT Study

open access: yesAntioxidants
The impact of photoisomerization on antioxidant properties holds significant implications for fields such as medicine, chemistry, and consumer products.
Lei Wang, Chaofan Sun, Lingling Wang
doaj   +1 more source

Cyclic Photoisomerization of Azobenzene in Atomistic Simulations: Modeling the Effect of Light on Columnar Aggregates of Azo Stars

open access: yesMolecules, 2021
This computational study investigates the influence of light on supramolecular aggregates of three-arm azobenzene stars. Every star contains three azobenzene (azo) moieties, each able to undergo reversible photoisomerization.
Markus Koch   +2 more
doaj   +1 more source

The D-ring, Not the A-ring, Rotates in Synechococcus OS-B' Phytochrome [PDF]

open access: yes, 2014
Phytochrome photoreceptors in plants and microorganisms switch photochromically between two states, controlling numerous important biological processes.
Borucki   +40 more
core   +2 more sources

Chemical control of excited-state reactivity of the anionic green fluorescent protein chromophore

open access: yesCommunications Chemistry
Controlling excited-state reactivity is a long-standing challenge in photochemistry, as a desired pathway may be inaccessible or compete with other unwanted channels.
Nanna H. List   +2 more
doaj   +1 more source

Investigation of photoinduced formation of microstructures on the surface of carbaseole-containing azopolymer depending on the power density of incident beams [PDF]

open access: yesКомпьютерная оптика, 2018
In this paper we synthesized and measured optical characteristics of an azopolymer based on the polymer N-epoxypropylcarbazole and chromophore 4 - (4-nytrophenylazo)-aniline.
Vladimir Podlipnov   +5 more
doaj   +1 more source

Facile Detection of Light-Controlled Radical Scavengers from Natural Products Using In Situ UV-LED NMR Spectroscopy

open access: yesAntioxidants, 2022
With the recent development of chemical analysis technology, attention has been placed on natural light-sensitive compounds that exhibit photoreactivity to expand the structural diversity of natural product chemistry. Photochemical reactions that proceed
InWha Park   +6 more
doaj   +1 more source

Photoswitchable Conductive Metal–Organic Frameworks

open access: yesAdvanced Functional Materials, EarlyView.
A conductive material where the conductivity can be modulated remotely by irradiation with light is presented. It is based on films of conductive metal–organic framework type Cu3(HHTP)2 with embedded photochromic molecules such as azobenzene, diarylethene, spiropyran, and hexaarylbiimidazole in the pores.
Yidong Liu   +5 more
wiley   +1 more source

Predicting and Rationalizing Piezoelectricity in Racemic Bioorganic Molecular Crystals

open access: yesAngewandte Chemie, EarlyView.
Racemic molecular crystals, composed of equal mixtures of chiral enantiomeric components, are predicted to exhibit significant piezoelectric responses and favourable mechanical flexibility. This study identifies organic and bioorganic racemates as promising candidates for sustainable, lead‐free materials, enabling next‐generation applications in energy
Shubham Vishnoi, Sarah Guerin
wiley   +2 more sources

Photoswitching Conduction in Framework Materials

open access: yesAdvanced 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

An Artificial Molecular Pump Powered by Light

open access: yesAngewandte Chemie, EarlyView.
A minimal rotaxane‐based supramolecular system functions as a light‐powered molecular pump, capturing macrocycles from solution and concentrating them within an intramolecular compartment. Repeated azobenzene photoisomerization modulates the binding and kinetic barriers of threading and shuttling, generating a photon‐driven energy ratchet that sustains
Federico Nicoli   +7 more
wiley   +2 more sources

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