Results 121 to 130 of about 2,106 (176)

Nitroxide-Substituted Nitronyl Nitroxide and Iminonitroxide

Journal of the American Chemical Society, 2010
We report on the highly compact nitroxide-substituted nitronyl nitroxide 1 and iminonitroxide 2; they have isoelectronic structures with trimethylenemethane. These diradicals are stable under aerated conditions at room temperature and have large positive exchange interactions: J/k(B) = +390 K (H = -2JS(1)(/)(2)·S(1/2)) for 1 and J/k(B) ≈ +550 K for 2.
Shuichi, Suzuki, Takanori, Furui, Masato, Kuratsu, Masatoshi, Kozaki, Daisuke, Shiomi, Kazunobu, Sato, Takeji, Takui, Keiji, Okada   +7 more
openaire   +2 more sources

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
openaire   +1 more source

The Experimental Spin Density of Two Nitrophenyl Nitroxides: A Nitronyl Nitroxide and an Imino Nitroxide

Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals, 1995
Abstract We have determined, by polarized neutron diffraction, the spin density of two nitrophenyl nitroxides: the para-nitrophenyl nitronyl nitroxide (p-NPNN), which is a ferromagnet at low temperature, and the meta-nitrophenyl imino nitroxide (m-NPIN), which exhibits antiferromagnetic coupling.
M. Bonnet, D. Luneau, E. Ressouche, P. Rey, J. Schweizer, M. Wan, H. Wang, A. Zheludev   +7 more
openaire   +1 more source

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
openaire   +1 more source

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
openaire   +2 more sources

“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
openaire   +1 more source

Pyrimidinyl Nitronyl Nitroxides

Chemistry – A European Journal, 2006
AbstractThe chemistry of 2,2,4,4‐substituted pentane derivatives has been investigated with the aim of providing a flexible and versatile synthetic route to pyrimidinyl nitronyl nitroxides, in which the bis‐N‐oxy fragment is incorporated in a six‐membered ring.
Peter, Brough, Jacques, Pécaut, André, Rassat, Paul, Rey   +3 more
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Fluorinated nitroxide radicals

Mendeleev Communications, 2006
AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Alexander I. Kokorin, Igor A. Grigor'ev
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ChemInform Abstract: NITROXIDES. LXXXV. AZETIDINE NITROXIDES

Chemischer Informationsdienst, 1978
AbstractDie auf bekanntem Wege zugängliche Verbindung (III) ergibt mit Allylmagnesiumbromid in Diethylether die Diallylverbindung (IV), die mit m‐Chlorperbenzoesäure in Diethylether zum Azetidinoxyl (V) oxidiert wird.
J.‐C. ESPIE, R. RAMASSEUL, A. RASSAT
openaire   +1 more source

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.
openaire   +1 more source