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Porion P, Ferrage E, Hubert F, Tertre E, Dabat T, Faugère AM, Condé F, Warmont F, Delville A. Water Mobility within Compacted Clay Samples: Multi-Scale Analysis Exploiting 1H NMR Pulsed Gradient Spin Echo and Magnetic Resonance Imaging of Water Density Profiles. ACS OMEGA 2018; 3:7399-7406. [PMID: 31458899 PMCID: PMC6644538 DOI: 10.1021/acsomega.8b01083] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/24/2018] [Accepted: 06/20/2018] [Indexed: 06/10/2023]
Abstract
1H NMR pulsed gradient spin echo attenuation and water density profile analysis by magnetic resonance imaging are both used to determine the mobility of water molecules confined within a porous network of compacted kaolinite clay sample (total porosity of ∼50%). These two complementary experimental procedures efficiently probe molecular diffusion within time scales varying between milliseconds and few hours, filling the gap between the time scale of diffusion dynamics measured by traditional quasi elastic neutron scattering and through-diffusion methods. Furthermore, magnetic resonance imaging is a nondestructive investigation tool that is able to assess the effect of the local structure on the macroscopic mobility of the diffusing probe.
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Affiliation(s)
- Patrice Porion
- Interfaces,
Confinement, Materiaux et Nanostructures, ICMN, UMR 7374, CNRS-Université
d’Orléans, 45071 Orléans Cedex 02, France
| | - Eric Ferrage
- IC2MP,
Equipe HydrASA, UMR 7285, CNRS-Université
de Poitiers, 5 rue A.
Turpain, TSA-51106, 86073 Poitiers Cedex 9, France
| | - Fabien Hubert
- IC2MP,
Equipe HydrASA, UMR 7285, CNRS-Université
de Poitiers, 5 rue A.
Turpain, TSA-51106, 86073 Poitiers Cedex 9, France
| | - Emmanuel Tertre
- IC2MP,
Equipe HydrASA, UMR 7285, CNRS-Université
de Poitiers, 5 rue A.
Turpain, TSA-51106, 86073 Poitiers Cedex 9, France
| | - Thomas Dabat
- IC2MP,
Equipe HydrASA, UMR 7285, CNRS-Université
de Poitiers, 5 rue A.
Turpain, TSA-51106, 86073 Poitiers Cedex 9, France
| | - Anne Marie Faugère
- Interfaces,
Confinement, Materiaux et Nanostructures, ICMN, UMR 7374, CNRS-Université
d’Orléans, 45071 Orléans Cedex 02, France
| | - Fatou Condé
- Interfaces,
Confinement, Materiaux et Nanostructures, ICMN, UMR 7374, CNRS-Université
d’Orléans, 45071 Orléans Cedex 02, France
| | - Fabienne Warmont
- Interfaces,
Confinement, Materiaux et Nanostructures, ICMN, UMR 7374, CNRS-Université
d’Orléans, 45071 Orléans Cedex 02, France
| | - Alfred Delville
- Interfaces,
Confinement, Materiaux et Nanostructures, ICMN, UMR 7374, CNRS-Université
d’Orléans, 45071 Orléans Cedex 02, France
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2
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Multi-Quanta Spin-Locking Nuclear Magnetic Resonance Relaxation Measurements: An Analysis of the Long-Time Dynamical Properties of Ions and Water Molecules Confined within Dense Clay Sediments. MAGNETOCHEMISTRY 2017. [DOI: 10.3390/magnetochemistry3040035] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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3
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Wallace M, Iggo JA, Adams DJ. Using solution state NMR spectroscopy to probe NMR invisible gelators. SOFT MATTER 2015; 11:7739-47. [PMID: 26313637 DOI: 10.1039/c5sm01760b] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Supramolecular hydrogels are formed via the self-assembly of gelator molecules upon application of a suitable trigger. The exact nature of this self-assembly process has been widely investigated as a practical understanding is vital for the informed design of these materials. Solution-state NMR spectroscopy is an excellent non-invasive tool to follow the self-assembly of supramolecular hydrogels. However, in most cases the self-assembled aggregates are silent by conventional (1)H NMR spectroscopy due to the low mobility of the constituent molecules, limiting NMR spectroscopy to following only the initial assembly step(s). Here, we present a new solution-state NMR spectroscopic method which allows the entire self-assembly process of a dipeptide gelator to be followed. This gelator forms transparent hydrogels by a multi-stage assembly process when the pH of an initially alkaline solution is lowered via the hydrolysis of glucono-δ-lactone (GdL). Changes in the charge, hydrophobicity and relative arrangement of the supramolecular aggregates can be followed throughout the assembly process by measuring the residual quadrupolar couplings (RQCs) of various molecular probes (here, (14)NH4(+) and isopropanol-d8), along with the NMR relaxation rates of (23)Na(+). The initially-formed aggregates comprise negatively charged fibrils which gradually lose their charge and become increasingly hydrophobic as the pH falls, eventually resulting in a macroscopic contraction of the hydrogel. We also demonstrate that the in situ measurement of pH by NMR spectroscopy is both convenient and accurate, representing a useful tool for the characterisation of self-assembly processes by NMR.
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Affiliation(s)
- Matthew Wallace
- Department of Chemistry, University of Liverpool, Crown Street, Liverpool, L69 7ZD, UK.
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4
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Carof A, Salanne M, Charpentier T, Rotenberg B. Accurate Quadrupolar NMR Relaxation Rates of Aqueous Cations from Classical Molecular Dynamics. J Phys Chem B 2014; 118:13252-7. [DOI: 10.1021/jp5105054] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Antoine Carof
- Sorbonne
Universités,
UPMC Univ. Paris 06, UMR 8234 PHENIX, 75005 Paris, France
- CNRS, UMR
8234
PHENIX, 75005 Paris, France
| | - Mathieu Salanne
- Sorbonne
Universités,
UPMC Univ. Paris 06, UMR 8234 PHENIX, 75005 Paris, France
- CNRS, UMR
8234
PHENIX, 75005 Paris, France
| | - Thibault Charpentier
- CEA, IRAMIS, NIMBE,
LSDRM, UMR CEA-CNRS 3299, F-91191 Gif-sur-Yvette cedex, France
| | - Benjamin Rotenberg
- Sorbonne
Universités,
UPMC Univ. Paris 06, UMR 8234 PHENIX, 75005 Paris, France
- CNRS, UMR
8234
PHENIX, 75005 Paris, France
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5
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Porion P, Faugère AM, Michot LJ, Paineau E, Delville A. Orientational microdynamics and magnetic-field-induced ordering of clay platelets detected by 2H NMR spectroscopy. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2010; 26:7035-7044. [PMID: 20047274 DOI: 10.1021/la904298d] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
The orientation of montmorillonite clays induced by a static magnetic field is quantified by using (2)H NMR spectroscopy. Indeed, the residual quadrupolar splitting of the (2)H resonance line measured for heavy water is a direct consequence of the specific orientation of the clay platelets in the static magnetic field. In the dilute regime, this residual splitting increases linearly with clay concentration, which confirms that the clay/clay electrostatic repulsions remain negligible by comparison with the diamagnetic coupling of these anisotropic platelets. At higher concentration, the electrostatic repulsion between clay particles markedly enhances the detected splitting. Such enhancement is well predicted by numerical simulations. By varying the size of the clay platelets and the strength of the static magnetic field, it is possible to evaluate the order of magnitude of the diamagnetic susceptibility of these anisotropic colloids.
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Affiliation(s)
- Patrice Porion
- Centre de Recherche sur la Matière Divisée, CNRS-Université d'Orléans, UMR6619, 45071 Orléans Cedex 02, France.
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