scholarly journals Low-Field Functional Group Resolved Nuclear Spin Relaxation in Mesoporous Silica

2021 ◽  
Author(s):  
Neil Robinson ◽  
Eric F. May ◽  
Michael L. Johns
Keyword(s):  
Mesoporous Silica ◽  
Spin Relaxation ◽  
Nuclear Spin ◽  
Functional Group ◽  
Nuclear Spin Relaxation ◽  
Low Field

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.

Nuclear-spin-relaxation mechanisms of nuclear-ordered bcc solidHe3in the low-field phase

1991 ◽  
Vol 44 (14) ◽  
pp. 7362-7372 ◽  
Author(s):  
Yutaka Sasaki ◽  
Taku Matsushita ◽  
Takao Mizusaki ◽  
Akira Hirai
Keyword(s):  
Spin Relaxation ◽  
Nuclear Spin ◽  
Nuclear Spin Relaxation ◽  
Field Phase ◽  
Low Field

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.

Outer-sphere nuclear spin relaxation in paramagnetic systems: a low-field theory

2001 ◽  
Vol 99 (17) ◽  
pp. 1435-1445 ◽  
Author(s):  
DANUTA KRUK ◽  
TOMAS NILSSON ◽  
JOZEF KOWALEWSKI
Keyword(s):  
Field Theory ◽  
Spin Relaxation ◽  
Nuclear Spin ◽  
Outer Sphere ◽  
Nuclear Spin Relaxation ◽  
Low Field

scholarly journals Protein Dynamics from Accurate Low-Field Site-Specific Longitudinal and Transverse Nuclear Spin Relaxation

2019 ◽  
Vol 10 (19) ◽  
pp. 5917-5922 ◽  
Author(s):  
Pavel Kadeřávek ◽  
Nicolas Bolik-Coulon ◽  
Samuel F. Cousin ◽  
Thorsten Marquardsen ◽  
Jean-Max Tyburn ◽  
...  
Keyword(s):  
Protein Dynamics ◽  
Spin Relaxation ◽  
Nuclear Spin ◽  
Nuclear Spin Relaxation ◽  
Field Site ◽  
Site Specific ◽  
Low Field
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