Results 21 to 30 of about 7,808 (189)

Synthesis of Nitroxide Diradical Using a New Approach

Molecules, 2020
A new synthetic pathway to diradical organic systems is proposed. The effectiveness of this approach was exemplified by the synthesis of a new nitroxide diradical. An interaction of perfluorobiphenyl with lithium tert-butylamide, followed by oxidation of
Pavel Fedyushin, Tatyana Rybalova, Nargiz Asanbaeva, Elena Bagryanskaya, Alexey Dmitriev, Nina Gritsan, Maxim Kazantsev, Evgeny Tretyakov   +7 more
doaj   +1 more source

Direct Iodination of Isoindolines and Isoindoline Nitroxides as Precursors to Functionalized Nitroxides [PDF]

European Journal of Organic Chemistry, 2013
AbstractA new method for the direct aryl iodination of isoindolines and isoindoline nitroxides that utilizes periodic acid and potassium iodide in sulfuric acid is presented. Di‐iodo functionalized tetramethyl and tetraethyl isoindolines and a di‐iodo tetramethyl isoindoline nitroxide were prepared in high yield (70–82 %).
Fairfull-Smith, Kathryn E., Debele, Emmanuel A., Allen, Jesse P., Pfrunder, Michael C., McMurtrie, John C.   +4 more
openaire   +4 more sources

Gold Clusters With Open‐Shell Ligands: Superatom Mediated Magnetic Interaction

Angewandte Chemie, EarlyView.
Open‐shell verdazyl radicals were covalently integrated with atomically precise Ir‐doped Au12 (Ir@Au12) superatoms. The resulting radical–superatom hybrids exhibit photoinduced electron transfer, spin delocalization onto the metal‐cluster core, and weak ferromagnetic communication between radicals mediated by the superatomic electronic structure ...
Katsuya Mutoh, Kosei Hayashi, Yoichi Kobayashi, Kazunobu Sato, Rika Tanaka, Daichi Kitagawa, Tatsuya Tsukuda, Takuya Nakashima   +7 more
wiley   +2 more sources

Crystal structure of 4′-{[4-(2,2′:6′,2′′-terpyridyl-4′-yl)phenyl]ethynyl}biphenyl-4-yl (2,2,5,5-tetramethyl-1-oxyl-3-pyrrolin-3-yl)formate benzene 2.5-solvate

Acta Crystallographica Section E: Crystallographic Communications, 2015
The title compound, C44H35N4O3·2.5C6H6 (1), consists of a terpyridine and a N-oxylpyrroline-3-formate group separated by an aromatic spacer, viz. 4-(phenylethynyl)-1,1′-biphenyl.
Andreas Meyer, Gregor Schnakenburg, Olav Schiemann   +2 more
doaj   +1 more source

The Reactions of 6-(Hydroxymethyl)-2,2-dimethyl-1-azaspiro[4.4]nonanes with Methanesulfonyl Chloride or PPh₃-CBr₄

Molecules, 2021
Activation of a hydroxyl group towards nucleophilic substitution via reaction with methanesulfonyl chloride or PPh3-CBr4 system is a commonly used pathway to various functional derivatives.
Yulia V. Khoroshunova, Denis A. Morozov, Andrey I. Taratayko, Sergey A. Dobrynin, Ilia V. Eltsov, Tatyana V. Rybalova, Yulia S. Sotnikova, Dmitriy N. Polovyanenko, Nargiz B. Asanbaeva, Igor A. Kirilyuk   +9 more
doaj   +1 more source

Engineering BN‐Doped Open‐Shell Polycyclic Hydrocarbons for Enhanced Photothermal Conversion and Therapy

Angewandte Chemie, EarlyView.
Two novel bonded BN‐doped polycyclic hydrocarbons BN‐Dira and BN‐Tetra with open‐shell character were rationally designed and synthesized. Their molecular structures were unambiguously confirmed by crystallographic analysis. Facilitated by their intense absorption in the NIR region, high PCE (83.6%) and good photothermal stability, BN‐Dira and BN‐Tetra
Peiyun Zeng, Ziqi Zhuang, Huan Luo, Yubin Fu, Peiyu Wang, Yating Zheng, Gang Liu, Junzhi Liu   +7 more
wiley   +2 more sources

Guidelines for the Simulations of Nitroxide X-Band cw EPR Spectra from Site-Directed Spin Labeling Experiments Using SimLabel

Molecules, 2023
Site-directed spin labeling (SDSL) combined with continuous wave electron paramagnetic resonance (cw EPR) spectroscopy is a powerful technique to reveal, at the local level, the dynamics of structural transitions in proteins.
Emilien Etienne, Annalisa Pierro, Ketty C. Tamburrini, Alessio Bonucci, Elisabetta Mileo, Marlène Martinho, Valérie Belle   +6 more
doaj   +1 more source

Computation of nitroxide–nitroxide distances in spin‐labeled DNA duplexes [PDF]

Biopolymers, 2007
AbstractNanometer distances in nucleic acids can be measured by EPR using two 1‐oxyl‐2,2,5,5‐tetramethylpyrroline radicals, with each label attached via a methylene group to a phosphorothioate‐substituted backbone position as one of two phosphorothioate diastereomers (RP and SP).
Eric A, Price, Brian T, Sutch, Qi, Cai, Peter Z, Qin, Ian S, Haworth   +4 more
openaire   +2 more sources

NMR and EPR Study of Homolysis of Diastereomeric Alkoxyamines

Molecules, 2020
Three alkoxyamines based on imidazoline radicals with a pyridine functional group—potential initiators of nitroxide-mediated, controlled radical polymerization—were synthesized.
Sergey Cherkasov, Dmitriy Parkhomenko, Alexander Genaev, Georgii Salnikov, Mariya Edeleva, Denis Morozov, Tatyana Rybalova, Igor Kirilyuk, Sylvain R. A. Marque, Elena Bagryanskaya   +9 more
doaj   +1 more source

A Low-Spin Co^II/Nitroxide Complex for Distance Measurements at Q-Band Frequencies

Magnetochemistry, 2022
Pulse dipolar electron paramagnetic resonance spectroscopy (PDS) is continuously furthering the understanding of chemical and biological assemblies through distance measurements in the nanometer range.
Angeliki Giannoulis, David B. Cordes, Alexandra M. Z. Slawin, Bela E. Bode   +3 more
doaj   +1 more source