Low frequency pulse excitation in zero field magnetic resonance

1988 ◽  
Vol 89 (11) ◽  
pp. 6623-6635 ◽  
Author(s):  
R. Kreis ◽  
A. Thomas ◽  
W. Studer ◽  
R. R. Ernst
Keyword(s):  
Magnetic Resonance ◽  
Low Frequency ◽  
Pulse Excitation ◽  
Zero Field ◽  
Frequency Pulse

scholarly journals Chemical Reaction Monitoring Using Zero-Field Nuclear Magnetic Resonance Enables Study of Heterogeneous Samples in Metal Containers

2020 ◽  
Author(s):  
Dudari B. Burueva ◽  
James Eills ◽  
John W. Blanchard ◽  
Antoine Garcon ◽  
Román Picazo Frutos ◽  
...  
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Susceptibility ◽  
Magnetic Resonance ◽  
Low Frequency ◽  
Hydrogen Gas ◽  
Zero Field ◽  
Sample Container ◽  
Electrically Conductive ◽  
Titanium Tube ◽  
Nuclear Magnetic

<div> <p>We demonstrate that heterogeneous/biphasic chemical reactions can be monitored with high spectroscopic resolution using zero-field nuclear magnetic resonance. This is possible because magnetic susceptibility broadening is insignificant at ultralow magnetic fields. We show the two-step hydrogenation of dimethyl acetylenedicarboxylate with <i>para</i>-enriched hydrogen gas in conventional glass NMR tubes, as well as in a titanium tube. The low frequency zero-field NMR signals ensure that there is no significant signal attenuation due to shielding by the electrically conductive sample container. This method paves the way for <i>in situ</i> monitoring of reactions in complex heterogeneous multiphase systems and in reactors made from conductive materials without magnetic susceptibility induced line broadening.</p></div>

Time-domain zero-field magnetic resonance with field pulse excitation

1985 ◽  
Vol 118 (2) ◽  
pp. 120-124 ◽  
Author(s):  
R. Kreis ◽  
D. Suter ◽  
R.R. Ernst
Keyword(s):  
Magnetic Resonance ◽  
Time Domain ◽  
Pulse Excitation ◽  
Zero Field ◽  
Field Pulse

scholarly journals Chemical Reaction Monitoring Using Zero-Field Nuclear Magnetic Resonance Enables Study of Heterogeneous Samples in Metal Containers

2020 ◽  
Author(s):  
Dudari B. Burueva ◽  
James Eills ◽  
John W. Blanchard ◽  
Antoine Garcon ◽  
Román Picazo Frutos ◽  
...  
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Susceptibility ◽  
Magnetic Resonance ◽  
Low Frequency ◽  
Hydrogen Gas ◽  
Zero Field ◽  
Sample Container ◽  
Electrically Conductive ◽  
Titanium Tube ◽  
Nuclear Magnetic

<div> <p>We demonstrate that heterogeneous/biphasic chemical reactions can be monitored with high spectroscopic resolution using zero-field nuclear magnetic resonance. This is possible because magnetic susceptibility broadening is insignificant at ultralow magnetic fields. We show the two-step hydrogenation of dimethyl acetylenedicarboxylate with <i>para</i>-enriched hydrogen gas in conventional glass NMR tubes, as well as in a titanium tube. The low frequency zero-field NMR signals ensure that there is no significant signal attenuation due to shielding by the electrically conductive sample container. This method paves the way for <i>in situ</i> monitoring of reactions in complex heterogeneous multiphase systems and in reactors made from conductive materials without magnetic susceptibility induced line broadening.</p></div>

Nuclear Magnetic Resonance Studies of δ-Stabilized Plutonium

2003 ◽  
Vol 802 ◽  
Author(s):  
N. J. Curro ◽  
L. Morales
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Low Frequency ◽  
Lattice Relaxation ◽  
Spin Fluctuations ◽  
Spin Lattice Relaxation ◽  
Cubic Symmetry ◽  
Magnetic Resonance Studies ◽  
Local Distortions ◽  
Nuclear Magnetic

Nuclear Magnetic Resonance studies of Ga stabilized δ-Pu reveal detailed information about the local distortions surrounding the Ga impurities as well as provides information about the local spin fluctuations experienced by the Ga nuclei. The Ga NMR spectrum is inhomogeneously broadened by a distribution of local electric field gradients (EFGs), which indicates that the Ga experiences local distortions from cubic symmetry. The Knight shift and spin lattice relaxation rate indicate that the Ga is dominantly coupled to the Fermi surface via core polarization, and is inconsistent with magnetic order or low frequency spin correlations.

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