Results 111 to 120 of about 31,710 (279)

Photoinduced Electron Transfer (PET) as Key to Accelerate the Cycloreversion Reaction of Arylquadricyclanes

Chemistry – A European Journal, EarlyView.
It is demonstrated that the photoinduced cycloreversion of a methoxynaphthylquadricyclane in the presence of suitable photocatalysts gives quantitatively the corresponding norbornadiene. As this photochromic norbornadiene‐quadricyclane cycle has favorable properties for light energy conversion, this method provides a useful tool for the targeted ...
Julian Felix Maria Hebborn, Heiko Ihmels, Marco Löcker, Thomas Paululat, Robin Schulte   +4 more
wiley   +1 more source

Synthesis of Dithienylcycloalkene Molecular Switches Enabled by a Bench‐Stable Ti‐Complex

Chemistry – A European Journal, EarlyView.
Herein we report a set of cycloalkene‐bridged DTEs with ring sizes ranging from 4‐ to 7‐membered rings. The synthesis of these analogs was performed via a key McMurry coupling step, which was enabled by a practical, bench‐stable Ti(IV)‐complex. Remarkably, it is shown that the strained cyclobutene bridge outperforms other rings, even the most commonly ...
Marcell M. Bogner, Márton Hegedűs, Péter P. Kalapos, Attila Kunfi, Gábor London   +4 more
wiley   +1 more source

Flexible interlocked porous frameworks allow quantitative photoisomerization in a crystalline solid

Nature Communications, 2017
Photochromic molecules have shown much promise as molecular components of stimuli-responsive materials, but despite recent achievements in various photoresponsive materials, quantitative conversion in photochemical reactions in solids is hampered by the ...
Yongtai Zheng, Hiroshi Sato, Pengyan Wu, H. Jeon, R. Matsuda, S. Kitagawa   +5 more
semanticscholar   +1 more source

Ambident Reactivity in the Phenyl + NO Radical Recombination

Chemistry – A European Journal, EarlyView.
ABSTRACT The recombination reaction of nitric oxide (NO) with radicals via its oxygen atom, rather than the more common nitrogen site, offers an intriguing pathway to the formation of oxynitrenes. The photochemical isomerization of nitroso compounds into their corresponding oxynitrenes may involve such a step.
Virinder Bhagat, Adrián Portela‐González, André K. Eckhardt, J. Philipp Wagner   +3 more
wiley   +1 more source

EVALUATION OF THE AVOBENZONE PHOTOSTABILITY IN SOLVENTS USED IN COSMETIC FORMULATIONS

Vitae, 2011
The use of sunscreen products is very important nowadays. The photostability of UV filters incorporated in these products must be preserved during its storing and application processes in order to achieve the claims about photoprotection of the ...
John Jairo VALLEJO, Mónica MESA, Cecilia GALLARDO   +2 more
doaj  

Chemiluminescence-initiated and in situ-enhanced photoisomerization for tissue-depth-independent photo-controlled drug release

Chemical Science, 2018
Tissue-penetration-depth-independent self-luminescence is highly expected to perform photoisomerization-related bioapplications in vivo to overcome the limitation of shallow tissue-penetration from external photoexcitation.
Yufu Tang, Xiaomei Lu, Chao Yin, Hui Zhao, Wenbo Hu, Xiaoming Hu, Yuanyuan Li, Zhen Yang, Feng Lu, Quli Fan, Wei Huang   +10 more
semanticscholar   +1 more source

Rational Design Strategies for Stimuli‐Responsive DNAzymes Using Modified and Artificial Nucleotides

Chemistry – A European Journal, EarlyView.
Activity control of RNA‐cleaving DNAzymes in response to external stimuli has attracted growing interest for applications in DNA‐based diagnostics, therapeutics, and dynamic DNA nanotechnology. This review summarizes rational design strategies for stimuli‐responsive DNAzymes using modified or artificial nucleotides, including split and caged DNAzymes ...
Yusuke Takezawa, Mitsuhiko Shionoya
wiley   +1 more source

Light‐controlled molecular tweezers capture specific amyloid oligomers

Aggregate
Amyloid‐β peptide (Aβ) oligomers, characteristic symptom of Alzheimer's disease (AD), have been identified as the most neurotoxic species and significant contributors to neurodegeneration in AD.
Chengyuan Qian, Jiefang Chen, Cheng Wang, Qiang Wang, Xiaoyong Wang, Xiaohui Wang   +5 more
doaj   +1 more source

Photochemical Е/Z isomerization of isonicotinoyl hydrazones based on pyridoxine derivatives

Учёные записки Казанского университета: Серия Естественные науки
Isonicotinoyl hydrazone of 6-carbaldehyde pyridoxine 1, existing as a mixture of E and Z isomers, is known to exhibit potent activity against drug-resistant strains of M. tuberculosis.
N. V. Shtyrlin, R. M. Khaziev, D. R. Islamov, Y. G. Shtyrlin   +3 more
doaj   +1 more source

Operando Magic Angle Spinning Solid‐State NMR Spectroscopy of Methanol Photoreforming Over Titania‐Coated Silica Monoliths

Chemistry – A European Journal, EarlyView.
Photoreforming of methanol is followed in real time by solid‐state Magic Angle Spinning NMR. The transparent sapphire sample holder is irradiated by four LEDs at 11.5 kHz MAS. Efficient light penetration into the sample volume is ensured by silica monoliths with a network of macropores, coated with TiO2, and enhancing light penetration by a factor of ...
Fei Ding, Karl König, Johannes Böhmer, Florian M. Wisser, Erdmann Spiecker, Benjamin Apeleo Zubiri, Dorothea Wisser   +6 more
wiley   +1 more source