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RMN de Surface Exalté par Polarisation Dynamique Nucléaire (SENS)


Action : Equipements d'excellence


N° de convention : 10-EQPX-0047

Informations générales

  • Référence projet : 10-EQPX-0047
  • RST : Anne LESAGE
  • Etablissement Coordinateur : CNRS Rhône Auvergne (Villeurbanne)
  • Région du projet : Auvergne-Rhône-Alpes
  • Discipline : 2 - SMI
  • Aide allouée : 1 799 140 €
  • Date de début du projet : 22/02/2011
  • Date de fin du projet : 31/12/2019
  • Mots clés : Nuclear Magnetic Resonance; Dynamic Nuclear Polarizatio; Surfaces; Materials;

Résumé du projet

Nuclear magnetic resonance (NMR) spectroscopy (often in conjunction with diffraction methods) is the method of choice for the molecular level characterization of materials (whether molecular, inorganic, nano-structured or biological), but many modern materials are below the sensitivity limit of detection for NMR. The sensitivity enhancement provided by DNP (factors up to several hundred) leads to reductions in experimental times of between three to five orders of magnitude. The performance of commercial DNP systems capable of providing these enhancements (mostly at 400 MHz) is outstanding, and already is the center of a plethora of new developments in NMR spectroscopy that were previously considered inconceivable. The project concerned the acquisition and the operation of one of the very first 800 MHz DNP accessories at the Institut des Sciences Analytiques (ISA) de Lyon. This instrument has been successfully installed in August 2013 (Tranche 1) and was the second 527 GHz system to be delivered in the world. While the first high field DNP NMR experiments have been focused on biological systems, we are particularly interested in the novel possibility that DNP yields to characterize surfaces and surface species central to modern sustainable chemistry, through catalysis and nanosciences. The introduction of non-aqueous solvents for solid-state DNP NMR (in 2011), the introduction of new, more efficient polarizing agents (in 2013), the amplification of the DNP effect by the incorporation of solid dielectrics into frozen solutions (2014), the demonstration that high enhancement factors could be preserved at high temperatures (2015), the publication of the first (worldwide) DNP spectra at fast magic angle spinning (in 2016), the first DNP enhanced 17O NMR spectra at 18.8 T (in 2016) or the investigation of Overhauser Effect DNP at high magnetic field and very fast spinning frequency are some of the landmark achievements of the first six years.

(L'auteur de ce résumé est le coordinateur du projet, qui est responsable du contenu de ce résumé. L'ANR décline par conséquent toute responsabilité quant à son contenu.)