Dynamic Nuclear Polarization with Polychlorotriphenylmethyl Radicals: Supramolecular Polarization-Transfer Effects

Ups and downs of DNP: Polychlorinated trityl radicals (see structure: C black, Cl green, Na gray, O red) used for dynamic nuclear polarization (DNP) showed a new transfer mechanism involving quadrupolar chlorine nuclei. The observation of positive or negative enhancements, depending on the substrate...

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Published inAngewandte Chemie (International ed.) Vol. 49; no. 19; pp. 3360 - 3362
Main Authors Gabellieri, Cristina, Mugnaini, Veronica, Paniagua, Juan Carlos, Roques, Nans, Oliveros, Malena, Feliz, Miguel, Veciana, Jaume, Pons, Miquel
Format Journal Article
LanguageEnglish
Published Weinheim Wiley-VCH Verlag 26.04.2010
WILEY-VCH Verlag
WILEY‐VCH Verlag
Subjects
Carbon Isotopes
Chlorine - chemistry
dynamic nuclear polarization
Free Radicals - chemistry
Magnetic Resonance Spectroscopy
NMR spectroscopy
polychlorination
quadrupolar nuclei
Trityl Compounds - chemistry
trityl radicals
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Summary:Ups and downs of DNP: Polychlorinated trityl radicals (see structure: C black, Cl green, Na gray, O red) used for dynamic nuclear polarization (DNP) showed a new transfer mechanism involving quadrupolar chlorine nuclei. The observation of positive or negative enhancements, depending on the substrate, highlights the supramolecular character of the initial polarization‐transfer process.
Bibliography:http://dx.doi.org/10.1002/anie.201000031
Networking Research Center on Bioengineering, Biomaterials, and NanoMedicine
istex:73F62D8835CB0F5EDB442B8B1F7436B09474904B
ArticleID:ANIE201000031
MICINN, Spain - No. BIO2007-63458; No. CTQ2006-06333/BQU
We gratefully acknowledge the financial support of the MICINN, Spain (BIO2007-63458, Project Consolider-C EMOCIONa, CTQ2006-06333/BQU, and LRB-ICTS), the Generalitat de Catalunya (2009S6R516 and 2009SGR1352), and the Networking Research Center on Bioengineering, Biomaterials, and NanoMedicine promoted by the ISCIII, Spain. V.M. acknowledges the MICINN, Spain for a Juan de la Cierva postdoctoral contract, and J.C.P. thanks F. Mota for discussions and help in solving computational problems. Preliminary data were acquired in Birmingham with support from EU-NMR. Computations were carried out at the Centre de Supercomputació de Catalunya (CESCA) through a grant from the Universitat de Barcelona.
Generalitat de Catalunya - No. 2009S6R516; No. 2009SGR1352
ark:/67375/WNG-N3ZQRB16-9
We gratefully acknowledge the financial support of the MICINN, Spain (BIO2007‐63458, Project Consolider‐C EMOCIONa, CTQ2006‐06333/BQU, and LRB‐ICTS), the Generalitat de Catalunya (2009S6R516 and 2009SGR1352), and the Networking Research Center on Bioengineering, Biomaterials, and NanoMedicine promoted by the ISCIII, Spain. V.M. acknowledges the MICINN, Spain for a Juan de la Cierva postdoctoral contract, and J.C.P. thanks F. Mota for discussions and help in solving computational problems. Preliminary data were acquired in Birmingham with support from EU‐NMR. Computations were carried out at the Centre de Supercomputació de Catalunya (CESCA) through a grant from the Universitat de Barcelona.
ObjectType-Article-1
SourceType-Scholarly Journals-1
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content type line 23
ISSN:1433-7851
1521-3773
DOI:10.1002/anie.201000031