Results 71 to 80 of about 6,232 (230)

Reversible photoswitching of the DNA-binding properties of styrylquinolizinium derivatives through photochromic [2 + 2] cycloaddition and cycloreversion

open access: yesBeilstein Journal of Organic Chemistry, 2020
It was demonstrated that styrylquinolizinium derivatives may be applied as photoswitchable DNA ligands. At lower ligand:DNA ratios (≤1.5), these compounds bind to duplex DNA by intercalation, with binding constants ranging from Kb = 4.1 × 104 M to 2.6 ...
Sarah Kölsch   +4 more
doaj   +1 more source

Generating and sustaining long-lived spin states in 15N,15N′-azobenzene [PDF]

open access: yes, 2019
Long-Lived spin States (LLSs) hold a great promise for sustaining non-thermal spin order and investigating various slow processes by Nuclear Magnetic Resonance (NMR) spectroscopy.
Ivanov, Konstantin L.   +6 more
core   +1 more source

Bidirectional Photoswitching of a Tailored Azobenzene with Red and Far‐Red Light Involving Triplet Sensitization in an Aqueous System

open access: yesAdvanced Science, EarlyView.
The action spectrum of a tailored azobenzene is shifted toward bio‐optical window through the chemical modification of its singlet and triplet energy levels. Consequently, the bidirectional photo‐switching of azobenzene in physiological conditions is achieved when excited by red and far‐red light, which offers greater tissue penetration.
Mila Miroshnichenko   +11 more
wiley   +1 more source

A Chiroptical Photoswitchable DNA Complex [PDF]

open access: yesThe Journal of Physical Chemistry B, 2011
The interesting structural, electronic, and optical properties of DNA provide fascinating opportunities for developing nanoscale smart materials by integrating DNA with opto-electronic components. In this article we demonstrate the electrostatic binding of an amine-terminated dithienylethene (DET) molecular switch to double-stranded synthetic ...
- Mammana   +4 more
openaire   +3 more sources

Photoinduced bidirectional mesophase transition in vesicles containing azobenzene amphiphiles

open access: yesIUCrJ
The functionality and efficiency of proteins within a biological membrane are highly dependent on both the membrane lipid composition and the physiochemical properties of the solution.
Svenja C. Hövelmann   +8 more
doaj   +1 more source

Synthesis of Functionalized Azobiphenyl‐ and Azoterphenyl‐ Ditopic Linkers: Modular Building Blocks for Photoresponsive Smart Materials

open access: yesChemistryOpen, 2019
Modular synthesis of structurally diverse functionalized azobiphenyls and azoterphenyls for the realization of optically switchable materials has been described.
Dr. Sylvain Grosjean   +5 more
doaj   +1 more source

Isomerisation of an intramolecular hydrogen-bonded photoswitch:Protonated azobis(2-imidazole) [PDF]

open access: yes, 2017
Photoisomerisation of protonated azobis(2-imidazole), an intramolecular hydrogen-bonded azoheteroarene photoswitch molecule, is investigated in the gas phase using tandem ion mobility mass spectrometry.
Bieske, Evan J.   +3 more
core   +2 more sources

Controlling Photochromism of Donor‐Acceptor Stenhouse Adducts on Micro‐Dot Arrays Beyond Human‐Eyes Resolution for Dynamic Light Encryption

open access: yesAdvanced Science, EarlyView.
This study presents a micro‐dot array strategy for dynamic light encryption, utilizing DASA‐based photochromism with resolution beyond human‐eye capacity. By precisely controlling isomerization kinetics, the method reveals multi‐layered encrypted information under specific light irradiation, enhancing information security and anti‐counterfeiting ...
Hongtao Hu   +10 more
wiley   +1 more source

Substituent effects in N-acetylated phenylazopyrazole photoswitches

open access: yesBeilstein Journal of Organic Chemistry
Phenylazopyrazole photoswitches proved to be valuable structural motifs for various applications ranging from materials science to medicine. Despite their potential, their structural diversity is still limited and a larger pool of substitution patterns ...
Radek Tovtik   +4 more
doaj   +1 more source

towards chameleon detergents for 2-D gel electrophoresis [PDF]

open access: yes, 2012
Caged non-ionic detergents, comprised of polar oligo(ethylene glycol) and non- polar alkyl chains joined by a photocleavable ortho-nitrobenzyl sulfonate linker have been synthesized and characterized.
Bogen, Oliver   +5 more
core   +1 more source

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