scholarly journals Polychlorinated trityl radicals for dynamic nuclear polarization: the role of chlorine nuclei

2010 ◽  
Vol 12 (22) ◽  
pp. 5824 ◽  
Author(s):  
Juan Carlos Paniagua ◽  
Verónica Mugnaini ◽  
Cristina Gabellieri ◽  
Miguel Feliz ◽  
Nans Roques ◽  
...  
Keyword(s):  
Dynamic Nuclear Polarization ◽  
Nuclear Polarization

scholarly journals The role of the glassy dynamics and thermal mixing in the dynamic nuclear polarization and relaxation mechanisms of pyruvic acid

2014 ◽  
Vol 16 (48) ◽  
pp. 27025-27036 ◽  
Author(s):  
M. Filibian ◽  
S. Colombo Serra ◽  
M. Moscardini ◽  
A. Rosso ◽  
F. Tedoldi ◽  
...  
Keyword(s):  
Relaxation Rate ◽  
Dynamic Nuclear Polarization ◽  
Pyruvic Acid ◽  
Nuclear Polarization ◽  
Lattice Relaxation ◽  
Spin Lattice Relaxation ◽  
Relaxation Rates ◽  
Thermal Mixing ◽  
Spin Lattice

In pyruvic acid containing 15 mM trityl below 4 K 13C polarization and spin–lattice relaxation rates are proportional to the spin–lattice relaxation rate of electrons, suggesting an efficient thermal mixing scenario.

scholarly journals Surface enhanced dynamic nuclear polarization solid-state NMR spectroscopy sheds light on Brønsted–Lewis acid synergy during the zeolite catalyzed methanol-to-hydrocarbon process

2019 ◽  
Vol 10 (39) ◽  
pp. 8946-8954 ◽  
Author(s):  
Abhishek Dutta Chowdhury ◽  
Irina Yarulina ◽  
Edy Abou-Hamad ◽  
Andrei Gurinov ◽  
Jorge Gascon
Keyword(s):  
Solid State ◽  
Nmr Spectroscopy ◽  
Lewis Acid ◽  
Dynamic Nuclear Polarization ◽  
Solid State Nmr ◽  
Nuclear Polarization ◽  
Solid State Nmr Spectroscopy ◽  
Surface Enhanced ◽  
Methanol To Hydrocarbon

Surface-enhanced dynamic nuclear polarization solid-state NMR spectroscopy has been applied to identify the role of surface-carbene species and elucidating Brønsted–Lewis acid synergy during the zeolite-catalyzed methanol-to-hydrocarbon process.

scholarly journals Optimizing nitroxide biradicals for cross-effect MAS-DNP: the role of g-tensors’ distance

2020 ◽  
Vol 22 (6) ◽  
pp. 3643-3652 ◽  
Author(s):  
Frédéric Mentink-Vigier
Keyword(s):  
Solid State ◽  
Dynamic Nuclear Polarization ◽  
Solid State Nmr ◽  
Nuclear Polarization ◽  
Magic Angle Spinning ◽  
Magic Angle ◽  
Cross Effect ◽  
Angle Spinning

Nitroxide biradicals are common polarizing agents used to enhance the sensitivity of solid-state NMR experiments via Magic Angle Spinning Dynamic Nuclear Polarization (MAS-DNP).

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