Sodium NMR relaxation in mesoporous systems

Ravinath Kausik; Kamilla Fellah; Donghan M. Yang

doi:10.1016/j.micromeso.2017.03.009

Sodium NMR relaxation in mesoporous systems

Ravinath Kausik, Kamilla Fellah, Donghan M. Yang

Research output: Contribution to journal › Article › peer-review

4 Scopus citations

Abstract

We explore the NMR relaxation of ²³Na nuclei in brine confined in mesoporous controlled porous glass. Bi-exponential decays characteristic of the relaxation of the quadrupole sodium nuclei under confinements can be clearly identified and contrasted with the mono-exponential decays observed for motional narrowed bulk brine solutions. The concentration dependence of either of the bi-exponential relaxation times of confined ²³Na nuclei, shows a trend opposite to that in bulk solutions. The understanding of this behavior could be fundamental for inferring sodium dynamics in bound water for oilfield formation evaluation and other applications such as monitoring the quality of building materials.

Original language	English (US)
Pages (from-to)	134-137
Number of pages	4
Journal	Microporous and Mesoporous Materials
Volume	269
DOIs	https://doi.org/10.1016/j.micromeso.2017.03.009
State	Published - Oct 2018
Externally published	Yes

Keywords

Brine in confinements
Quadrupole relaxation
Sodium NMR
Sodium NMR in nanopores

ASJC Scopus subject areas

General Chemistry
General Materials Science
Condensed Matter Physics
Mechanics of Materials

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10.1016/j.micromeso.2017.03.009

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title = "Sodium NMR relaxation in mesoporous systems",

abstract = "We explore the NMR relaxation of 23Na nuclei in brine confined in mesoporous controlled porous glass. Bi-exponential decays characteristic of the relaxation of the quadrupole sodium nuclei under confinements can be clearly identified and contrasted with the mono-exponential decays observed for motional narrowed bulk brine solutions. The concentration dependence of either of the bi-exponential relaxation times of confined 23Na nuclei, shows a trend opposite to that in bulk solutions. The understanding of this behavior could be fundamental for inferring sodium dynamics in bound water for oilfield formation evaluation and other applications such as monitoring the quality of building materials.",

keywords = "Brine in confinements, Quadrupole relaxation, Sodium NMR, Sodium NMR in nanopores",

author = "Ravinath Kausik and Kamilla Fellah and Yang, {Donghan M.}",

note = "Publisher Copyright: {\textcopyright} 2017 Elsevier Inc.",

year = "2018",

month = oct,

doi = "10.1016/j.micromeso.2017.03.009",

language = "English (US)",

volume = "269",

pages = "134--137",

journal = "Microporous and Mesoporous Materials",

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TY - JOUR

T1 - Sodium NMR relaxation in mesoporous systems

AU - Kausik, Ravinath

AU - Fellah, Kamilla

AU - Yang, Donghan M.

PY - 2018/10

Y1 - 2018/10

N2 - We explore the NMR relaxation of 23Na nuclei in brine confined in mesoporous controlled porous glass. Bi-exponential decays characteristic of the relaxation of the quadrupole sodium nuclei under confinements can be clearly identified and contrasted with the mono-exponential decays observed for motional narrowed bulk brine solutions. The concentration dependence of either of the bi-exponential relaxation times of confined 23Na nuclei, shows a trend opposite to that in bulk solutions. The understanding of this behavior could be fundamental for inferring sodium dynamics in bound water for oilfield formation evaluation and other applications such as monitoring the quality of building materials.

AB - We explore the NMR relaxation of 23Na nuclei in brine confined in mesoporous controlled porous glass. Bi-exponential decays characteristic of the relaxation of the quadrupole sodium nuclei under confinements can be clearly identified and contrasted with the mono-exponential decays observed for motional narrowed bulk brine solutions. The concentration dependence of either of the bi-exponential relaxation times of confined 23Na nuclei, shows a trend opposite to that in bulk solutions. The understanding of this behavior could be fundamental for inferring sodium dynamics in bound water for oilfield formation evaluation and other applications such as monitoring the quality of building materials.

KW - Brine in confinements

KW - Quadrupole relaxation

KW - Sodium NMR

KW - Sodium NMR in nanopores

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DO - 10.1016/j.micromeso.2017.03.009

M3 - Article

AN - SCOPUS:85032389026

SN - 1387-1811

VL - 269

SP - 134

EP - 137

JO - Microporous and Mesoporous Materials

JF - Microporous and Mesoporous Materials

ER -

Sodium NMR relaxation in mesoporous systems

Abstract

Keywords

ASJC Scopus subject areas

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