DETERMINATION OF THE SPIN-ROTATION INTERACTION CONSTANTS IN CH4 BY MEANS OF NUCLEAR SPIN RELAXATION MEASUREMENTS

1967 ◽  
Vol 45 (10) ◽  
pp. 3411-3413 ◽  
Author(s):  
Myer Bloom ◽  
Robert Dorothy
Keyword(s):  
Spin Relaxation ◽  
Nuclear Spin ◽  
Spin Rotation ◽  
Nuclear Spin Relaxation ◽  
Relaxation Measurements

Determination of spin–rotation interaction constants in fluorinated methane molecules by means of nuclear spin relaxation measurements

1970 ◽  
Vol 48 (6) ◽  
pp. 793-804 ◽  
Author(s):  
Ronald Y. Dong ◽  
Myer Bloom
Keyword(s):  
Spin Relaxation ◽  
Nuclear Spin ◽  
Spin Symmetry ◽  
Spin Rotation ◽  
Coupling Constants ◽  
Nuclear Spin Relaxation ◽  
Dipolar Interactions ◽  
New Information ◽  
Relaxation Measurements

The proton and fluorine spin relaxation time T1 has been measured in CH4, CF4, CHF3, and CH3F gases at low densities. By measuring the dependence of T1 on density near the characteristic T1 minimum, new information has been obtained on the spin–rotation interaction coupling constants in CF4, CHF3, and CH3F. The CH4 system was used to test the validity of this method since the spin–rotation coupling constants are accurately known for CH4. The correlation function for the spin–rotation interaction was found to be exponential within experimental error for all of the molecules studied. In the analysis of the experimental data, the effects of the dipolar interactions and of nuclear spin symmetry considerations were completely neglected. The validity of these approximations is discussed in the Appendix.

Determination of the velocity of mobile dislocations by nuclear spin relaxation measurements

1977 ◽  
Vol 80 (1) ◽  
pp. 235-243 ◽  
Author(s):  
H. J. Hackelöer ◽  
H. Selbach ◽  
O. Kanert ◽  
A. W. Sleeswyk ◽  
G. Hut
Keyword(s):  
Spin Relaxation ◽  
Nuclear Spin ◽  
Nuclear Spin Relaxation ◽  
Relaxation Measurements

scholarly journals Functional Group Resolved Nuclear Spin Relaxation in Porous Media

2021 ◽  
Author(s):  
Neil Robinson ◽  
Eric May ◽  
Michael Johns
Keyword(s):  
Spin Relaxation ◽  
Nuclear Spin ◽  
Functional Group ◽  
Proton Exchange ◽  
Nuclear Spin Relaxation ◽  
Separation Processes ◽  
Diverse Range ◽  
Non Invasive ◽  
Relaxation Measurements ◽  
Low Magnetic Field

Understanding solid-fluid interactions within porous materials is critical for their efficient utilisation across chemical reaction and separation processes. However, detailed characterisation of interfacial phenomena within such systems is hampered by their optically opaque nature. Motivated by the need to bridge this capability gap, we detail here the application of low magnetic field 2D <sup>1</sup>H nuclear spin relaxation measurements as a non-invasive probe of sorbate/sorbent interactions, exploring the relaxation characteristics exhibited by liquid adsorbates confined to a model mesoporous silica. For the first time, we demonstrate the capacity of such measurements to distinguish functional group-specific relaxation phenomena across a diverse range of protic adsorbates of wide importance as solvents, reagents, and hydrogen carriers, with distinct relaxation environments assigned to the alkyl and hydroxyl moieties of the confined liquids. Uniquely, this relaxation behaviour is shown to correlate with adsorbate acidity, with the observed relationship rationalised on the basis of surface-adsorbate proton exchange dynamics.

Determination of relative diffusion constants in a non-viscous liquid solution by nuclear spin relaxation

1982 ◽  
Vol 47 (5) ◽  
pp. 1153-1158 ◽  
Author(s):  
P.H. Fries ◽  
E. Belorizky ◽  
M. Minier ◽  
J.P. Albrand ◽  
M.C. Taieb
Keyword(s):  
Viscous Liquid ◽  
Spin Relaxation ◽  
Nuclear Spin ◽  
Liquid Solution ◽  
Nuclear Spin Relaxation ◽  
Relative Diffusion ◽  
Diffusion Constants
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