Dynamic Nuclear Polarization and Other Magnetic Ideas at EPFL

作者：Bornet Aurelien^*; Milani Jonas; Wang Shutao; Mammoli Daniele; Buratto Roberto; Salvi Nicola; Segawa Takuya F; Vitzthum Veronika; Mieville Pascal; Chinthalapalli Srinivas; Perez Linde Angel J; Carnevale Diego; Jannin Sami; Caporini Marc; Ulzega Simone; Rey Martial; Bodenhausen Geoffrey

来源：Chimia, 2012, 66(10): 734-740.

DOI：10.2533/chimia.2012.734

• Dissolution DNP
• Dynamic nuclear polarization (DNP)
• Hyperpolarization
• Magic angle spinning (MAS)
• MAS-DNP
• Nuclear magnetic resonance (NMR)

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 H-1 to C-13 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.

• 出版日期2012