Results 201 to 210 of about 32,433 (236)

Solvent Effect in β-Phosphorylated Nitroxides: Model Nitroxides

Applied Magnetic Resonance, 2015
Solvent effects have been investigated for the last four decades. As far as we know, only 3 articles have reported on the solvent effect with beta-phosphorylated nitroxides. In 1976, Il'Yasov and coll. (Theor Exp Chem 12:656, 1976) showed in 16 solvents that the phosphorus hyperfine coupling constant a (P) linearly decreased with the polarity of the ...
Audran, Gérard, Bosco, Lionel, S.R.A., Marque, Brémond, Paul, Butscher, Teddy   +4 more
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Lanthanide–Nitronyl Nitroxide Chains Derived from Multidentate Nitronyl Nitroxides

Inorganic Chemistry, 2018
Unprecedented lanthanide (Ln)-radical loop-chain coordination polymers were achieved using multidentate pyridyl- or triazole- substituted nitronyl nitroxide ligands. Their magnetic units consist of ferromagnetic [Ln2Radical] moieties, leading for the dysprosium(III) derivatives to slow relaxation of magnetization, which was found to be dependent on the
Juan Sun, Zan Sun, Licun Li, Jean-Pascal Sutter   +3 more
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ChemInform Abstract: NITROXIDE 49. MITT. STEROID‐NITROXIDE

Chemischer Informationsdienst, 1972
AbstractDas Lactam (I) reagiert mit Dimethylsulfat zum Lactimäther (II),der bei Behandlung mit Allylmagnesiumbromid zum Amin (III) führt.
R. RAMASSEUL, A. RASSAT
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“Conjugated” nitronyl-nitroxide and imino-nitroxide biradicals

J. Chem. Soc. D, 1969
The new biradicals (3), (5) and (6) have low lying triplet states having perpendicular conformations in solution.
Edwin F. Ullman, D. G. B. Boocock
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Organic Synthesis Using Nitroxides

Chemical Reviews, 2023
Nitroxides, also known as nitroxyl radicals, are long-lived or stable radicals with the general structure R1R2N-O•. The spin distribution over the nitroxide N and O atoms contributes to the thermodynamic stability of these radicals. The presence of bulky N-substituents R1 and R2 prevents nitroxide radical dimerization, ensuring their kinetic stability.
Dirk Leifert, Armido Studer
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Fluorophore–Nitroxide (Profluorescent Nitroxide) Probes

2020
Over the last decades, scientists have faced growing requirements in novel methods of fast and sensitive analysis of antioxidant status of biological systems, redox probing and radical trapping, biological molecules’ analysis, investigation of molecular dynamics, and convenient models for studies of photophysical and photochemical processes.
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Identification of Nitroxide Radioprotectors

Radiation Research, 1992
The nitroxide Tempol, a stable free radical, has recently been shown to protect mammalian cells against several forms of oxidative stress including radiation-induced cytotoxicity. To extend this observation, six additional water-soluble nitroxides with different structural features were evaluated for potential radioprotective properties using Chinese ...
S M, Hahn, L, Wilson, C M, Krishna, J, Liebmann, W, DeGraff, J, Gamson, A, Samuni, D, Venzon, J B, Mitchell   +8 more
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A Profluorescent Azaphenalene Nitroxide for Nitroxide-Mediated Polymerization1

Australian Journal of Chemistry, 2011
A novel nitroxide-mediated polymerization (NMP) control agent; 1,1,3,3-tetramethyl-2,3-dihydro-2-azaphenalen-2-yloxyl (TMAO), was used in the free-radical polymerization of styrene. The conversion of styrene during NMP was studied using FT-Raman spectroscopy and the effectiveness of TMAO as a NMP control agent was assessed by GPC analysis.
John M. Colwell, James P. Blinco, Courtney Hulbert, Kathryn E. Fairfull-Smith, Steven E. Bottle   +4 more
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Alkylpentacyanocobalt nitroxide and primary alkyl nitroxide radical-anions

Journal of the Chemical Society, Chemical Communications, 1972
Monomeric aliphatic nitroso-compounds react with {Co(CN)5}3– in aqueous/alcoholic solutions to give radical-anions {(NC)5Co–N(Alk)–O·}3– and/or (Alk–N–O–) which can be characterised by e.s.r.; they have lifetimes of the order of minutes.
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Nitroxide-mediated radical processes

The Chemical Record, 2005
In the present short review article recent achievements in nitroxide-mediated radical polymerizations are presented. The basic concept behind these reactions, which is the Persistent Radical Effect (PRE), will be briefly explained. The effect of the nitroxide structure on the polymerization process will be discussed.
Armido, Studer, Tobias, Schulte
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