Effect of Exchange Dynamics on the NMR Relaxation of Water in Porous Silica.

ABSTRACT: The interaction of molecules, in particular, water, with solid interfaces has been studied by a multitude of methods, among them nuclear magnetic resonance spin relaxation. The frequency dependence of the relaxation times follows patterns that have been interpreted in terms of the molecular orientation and dynamics. Several different model approaches could successfully explain limiting cases of ¹H relaxation dispersion in systems with rigid surfaces such as silica gel or glass, but none of them can reproduce the relaxation of both ¹H and ²H nuclei, which differ in their respective relaxation mechanisms, dipolar vs quadrupolar. From detailed studies of the dynamics of hydration of water in biological materials, the importance of hydrogen and molecular exchan

SUBMITTER: Gizatullin B 

PROVIDER: S-EPMC11571216 | biostudies-literature | 2024 Nov

REPOSITORIES: biostudies-literature