Long-Time Dynamics of Confined Water Molecules Probed by H-2 NMR Multiquanta Relaxometry: An Application to Dense Clay Sediments

作者：Porion Patrice; Michot Laurent J; Warmont Fabienne; Faugere Anne Marie; Delville Alfred^*

来源：Journal of Physical Chemistry C, 2012, 116(33): 17682-17697.

DOI：10.1021/jp305577g

The structural and dynamical properties of water molecules confined within dense day sediment are investigated by H-2 NMR spectroscopy and multiquanta relaxometry. The relative contribution of both quadrupolar and paramagnetic NMR relaxation mechanisms is evaluated by carefully analyzing the variation of H-2 multiquanta NMR relaxation rates as a function of the orientation of the day sediment within the static magnetic field. The same analysis is successfully applied to H-2 multiquanta NMR spin-locking relaxation measurements, significantly increasing the probed dynamical range. That procedure leads to an accurate determination of the average residence time of the water molecule confined within the interlamellar space of the day lamellae.

• 出版日期2012-8-23