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oai:recercat.cat:2445/695902025-12-04T21:45:20Zcom_2072_1057col_2072_478917col_2072_478933

urn:hdl:2445/69590 Self-assembled trityl radical capsules implications for dynamic nuclear polarization Marín Montesinos, Ildefonso Paniagua, Juan Carlos Vilaseca Casas, Marta Urtizberea, A. Luis Vitalla, Fernando Feliz Rodenas, Miguel Lin, F. Van Doorslaer, S. Pons Vallès, Miquel Química física Polarització (Física nuclear) Ressonància paramagnètica electrònica Physical and theoretical chemistry Polarization (Nuclear physics) Electron paramagnetic resonance A new class of guest-induced, bi-radical self-assembled organic capsules is reported. They are formed by the inclusion of a tetramethylammonium (TMA) cation between two monomers of the stable trityl radical OX63. OX63 is extensively used in dissolution dynamic nuclear polarization (DNP) where it leads to NMR sensitivity enhancements of several orders of magnitude. The supramolecular properties of OX63 have a strong impact on its DNP properties. An especially relevant case is the polarization of choline-containing metabolites, where complex formation between choline and OX63 results in faster relaxation. 2016-02-18T11:24:58Z 2016-02-18T11:24:58Z 2015-01-20 2016-02-18T11:24:58Z info:eu-repo/semantics/article info:eu-repo/semantics/acceptedVersion Versió postprint del document publicat a: http://dx.doi.org/10.1039/c4cp05225k Physical Chemistry Chemical Physics, 2015, vol. 17, p. 5785-5794 http://dx.doi.org/10.1039/c4cp05225k info:eu-repo/grantAgreement/EC/FP7/261863/EU//BIO-NMR (c) Marin-Montesinos, I. et al., 2015 info:eu-repo/semantics/openAccess Royal Society of Chemistry Articles publicats en revistes (Química Inorgànica i Orgànica)