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.

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Positiv oder negativ: Polychlorierte Tritylradikale (siehe Struktur: C schwarz, Cl grün, Na grau, O rot) zeigten beim Einsatz in der dynamischen Kernpolarisation (DNP) einen neuen Transfermechanismus unter Beteiligung der quadrupolaren Chlorkerne. Die Beobachtung positiver oder negativer Verstärkungen für verschiedene Substrate spricht für einen supramolekularen Charakter des anfänglichen Polarisationstransfers.

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Volume122, Issue19

April 26, 2010

Pages 3432-3434

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

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

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