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Title: Polychlorinated trityl radicals for dynamic nuclear polarization: the role of chlorine nuclei
Author: Paniagua, Juan Carlos
Mugnaini, Verónica
Gabellieri, Cristina
Feliz Rodenas, Miguel
Roques, Nans
Veciana, Jaume
Pons Vallès, Miquel
Keywords: Ressonància magnètica nuclear
Camps magnètics
Polarització (Física nuclear)
Matèria condensada
Radicals (Química)
Nuclear magnetic resonance
Magnetic fields
Polarization (Nuclear physics)
Condensed matter
Radicals (Chemistry)
Issue Date: 2010
Publisher: Royal Society of Chemistry
Abstract: Polychlorinated trityl radicals bearing carboxylate substituents are water soluble persistent radicals that can be used for dynamic nuclear polarization. In contrast to other trityl radicals, the polarization mechanism differs from the classical solid effect. DFT calculations performed to rationalize this behaviour support the hypothesis that polarization is transferred from the unpaired electron to chlorine nuclei and from these to carbon by spin diffusion. The marked differences observed between neutral and anionic forms of the radical will be discussed.
Note: Versió postprint del document publicat a: 10.1039/C003291N
It is part of: Physical Chemistry Chemical Physics, 2010, vol. 12, p. 5824-5829
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ISSN: 1463-9076
Appears in Collections:Articles publicats en revistes (Química Inorgànica i Orgànica)

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