2026-04-17T06:45:41Zhttps://recercat.cat/oai/request

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

00925njm 22002777a 4500 dc Marín Montesinos, Ildefonso author Paniagua, Juan Carlos author Vilaseca Casas, Marta author Urtizberea, A. author Luis Vitalla, Fernando author Feliz Rodenas, Miguel author Lin, F. author Van Doorslaer, S. author Pons Vallès, Miquel author 2016-02-18T11:24:58Z 2016-02-18T11:24:58Z 2015-01-20 2016-02-18T11:24:58Z 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. Química física Polarització (Física nuclear) Ressonància paramagnètica electrònica Physical and theoretical chemistry Polarization (Nuclear physics) Electron paramagnetic resonance Self-assembled trityl radical capsules implications for dynamic nuclear polarization