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Article Dans Une Revue CHIMIA Année : 2012

Dynamic Nuclear Polarization and Other Magnetic Ideas at EPFL.

Jonas Milani
  • Fonction : Auteur
Shutao Wang
  • Fonction : Auteur
Daniele Mammoli
  • Fonction : Auteur
Roberto Buratto
  • Fonction : Auteur
Nicola Salvi
Takuya F Segaw
  • Fonction : Auteur
Pascal Miéville
  • Fonction : Auteur
Srinivas Chinthalapalli
  • Fonction : Auteur
Angel J Perez-Linde
  • Fonction : Auteur
Diego Carnevale
  • Fonction : Auteur
Marc Caporinia
  • Fonction : Auteur
Simone Ulzegaa
  • Fonction : Auteur

Résumé

Although nuclear magnetic resonance (NMR) can provide a wealth of information, it often suffers from a lack of sensitivity. Dynamic Nuclear Polarization (DNP) provides a way to increase the polarization and hence the signal intensities in NMR spectra by transferring the favourable electron spin polarization of paramagnetic centres to the surrounding nuclear spins through appropriate microwave irradiation. In our group at EPFL, two complementary DNP techniques are under investigation: the combination of DNP with magic angle spinning at temperatures near 100 K ('MAS-DNP'), and the combination of DNP at 1.2 K with rapid heating followed by the transfer of the sample to a high-resolution magnet ('dissolution DNP'). Recent applications of MAS-DNP to surfaces, as well as new developments of magnetization transfer of (1)H to (13)C at 1.2 K prior to dissolution will illustrate the work performed in our group. A second part of the paper will give an overview of some 'non-enhanced' activities of our laboratory in liquid- and solid-state NMR.

Domaines

Chimie organique

Dates et versions

hal-00751775 , version 1 (14-11-2012)

Identifiants

Citer

Aurélien Bornet, Jonas Milani, Shutao Wang, Daniele Mammoli, Roberto Buratto, et al.. Dynamic Nuclear Polarization and Other Magnetic Ideas at EPFL.. CHIMIA, 2012, 66 ((10)), pp.734-40. ⟨10.2533/chimia.2012.734⟩. ⟨hal-00751775⟩
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