Spectral spin diffusion in polycrystalline solids under magic-angle spinning

1988 ◽  
Vol 84 (11) ◽  
pp. 3713 ◽  
Author(s):  
Atsushi Kubo ◽  
Charles A. McDowell
Keyword(s):  
Spin Diffusion ◽  
Magic Angle Spinning ◽  
Magic Angle ◽  
Polycrystalline Solids ◽  
Angle Spinning

MIRROR recoupling and its application to spin diffusion under fast magic-angle spinning

2008 ◽  
Vol 460 (1-3) ◽  
pp. 278-283 ◽  
Author(s):  
Ingo Scholz ◽  
Matthias Huber ◽  
Theofanis Manolikas ◽  
Beat H. Meier ◽  
Matthias Ernst
Keyword(s):  
Spin Diffusion ◽  
Magic Angle Spinning ◽  
Magic Angle ◽  
Angle Spinning ◽  
Fast Magic Angle Spinning

Electron-driven spin diffusion supports crossing the diffusion barrier in MAS DNP

2018 ◽  
Vol 20 (16) ◽  
pp. 11418-11429 ◽  
Author(s):  
Johannes J. Wittmann ◽  
Michael Eckardt ◽  
Wolfgang Harneit ◽  
Björn Corzilius
Keyword(s):  
Dynamic Nuclear Polarization ◽  
Diffusion Barrier ◽  
Nuclear Polarization ◽  
Spin Diffusion ◽  
Hyperfine Interactions ◽  
Magic Angle Spinning ◽  
Magic Angle ◽  
Diffusion Rates ◽  
Angle Spinning

Hyperfine interactions can quench homonuclear spin-diffusion in the direct vicinity of a polarizing agent in dynamic nuclear polarization (DNP). However, under magic-angle spinning (MAS), the same interactions may also enhance the spin-diffusion rates through an electron-driven spin diffusion (EDSD) mechanism introduced here.

scholarly journals Direct observation of hyperpolarization breaking through the spin diffusion barrier

2021 ◽  
Vol 7 (18) ◽  
pp. eabf5735
Author(s):  
Quentin Stern ◽  
Samuel François Cousin ◽  
Frédéric Mentink-Vigier ◽  
Arthur César Pinon ◽  
Stuart James Elliott ◽  
...  
Keyword(s):  
Diffusion Barrier ◽  
Nuclear Polarization ◽  
Spin Diffusion ◽  
Magic Angle Spinning ◽  
Resonance Spectroscopy ◽  
Magic Angle ◽  
Paramagnetic Centers ◽  
Static Mode ◽  
Angle Spinning ◽  
Marked Dependence

Dynamic nuclear polarization (DNP) is a widely used tool for overcoming the low intrinsic sensitivity of nuclear magnetic resonance spectroscopy and imaging. Its practical applicability is typically bounded, however, by the so-called “spin diffusion barrier,” which relates to the poor efficiency of polarization transfer from highly polarized nuclei close to paramagnetic centers to bulk nuclei. A quantitative assessment of this barrier has been hindered so far by the lack of general methods for studying nuclear polarization flow in the vicinity of paramagnetic centers. Here, we fill this gap and introduce a general set of experiments based on microwave gating that are readily implemented. We demonstrate the versatility of our approach in experiments conducted between 1.2 and 4.2 K in static mode and at 100 K under magic angle spinning (MAS)—conditions typical for dissolution DNP and MAS-DNP—and directly observe the marked dependence of polarization flow on temperature.

Sensitivity enhanced 14N/14N correlations to probe inter-beta-sheet interactions using fast magic angle spinning solid-state NMR in biological solids

2016 ◽  
Vol 18 (32) ◽  
pp. 22583-22589 ◽  
Author(s):  
Manoj Kumar Pandey ◽  
Jean-Paul Amoureux ◽  
Tetsuo Asakura ◽  
Yusuke Nishiyama
Keyword(s):  
Solid State ◽  
Solid State Nmr ◽  
Spin Diffusion ◽  
Correlation Method ◽  
Magic Angle Spinning ◽  
Magic Angle ◽  
Beta Sheet ◽  
Biological Solids ◽  
Angle Spinning ◽  
Fast Magic Angle Spinning

Sensitivity enhanced proton-detected 14N/14N correlation method mediated through accelerated 1H–1H spin diffusion at fast magic angle spinning (MAS) solid-state NMR is demonstrated to distinguish inter-beta-sheet interactions in naturally abundant parallel and anti-parallel alanine tripeptides.

Investigation of Domain Size in Polymer Membranes Using Double-Quantum-Filtered Spin Diffusion Magic Angle Spinning NMR

2005 ◽  
Vol 38 (4) ◽  
pp. 1201-1206 ◽  
Author(s):  
B. R. Cherry ◽  
C. H. Fujimoto ◽  
C. J. Cornelius ◽  
T. M. Alam
Keyword(s):  
Spin Diffusion ◽  
Polymer Membranes ◽  
Domain Size ◽  
Magic Angle Spinning ◽  
Double Quantum ◽  
Magic Angle ◽  
Angle Spinning
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