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Umut E, Beira MJ, Oztop MH, Sahiner N, Sebastião PJ, Kruk D. Water Dynamics in Dextran-Based Hydrogel Micro/Nanoparticles Studied by NMR Diffusometry and Relaxometry. J Phys Chem B 2023; 127:8950-8960. [PMID: 37812396 DOI: 10.1021/acs.jpcb.3c04452] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/10/2023]
Abstract
Water dynamics in mesoporous dextran hydrogel micro/nanoparticles was investigated by means of nuclear magnetic resonance (NMR) techniques. High-resolution 1H NMR spectra and pulsed field gradient (PFG) NMR diffusometry measurements obtained on swollen state dextran micro/nanogel revealed the existence of different fractions of water molecules based on their interaction with the gel matrix. In addition to the translational diffusion of bulk water, two more diffusion processes characterized with self-diffusion coefficients 1 and 2 orders of magnitude smaller than that of bulk water were identified. 1H spin-lattice relaxation dispersion profiles obtained for a broad range of Larmor frequencies using fast field cycling (FFC) and conventional NMR relaxometry techniques allowed us to further clarify the mechanisms of molecular motion. According to the water proton pool fractions and associated self-diffusion coefficients, it is shown that the relaxation contribution associated with reorientation-mediated translational motions (RMTDs) dominates the relaxation dispersion observed at intermediate frequencies. At very low frequencies, the spin-lattice relaxation rate is dominated by the slow solid-gel dynamics probed by the water molecules interacting with the pores' surface hydroxyl groups due to the rapid chemical exchange between surface hydroxyl groups and free water. The correlation time for the thumbling-like motion of the dextran gel was found to be in the submillisecond range. The values of the self-diffusion and coherence lengths associated with motion of water molecules interacting with the solid-gel particles are consistent with the particle size and pore size distributions obtained for the studied dextran gels.
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Affiliation(s)
- Evrim Umut
- Department of Medical Imaging Techniques, School of Healthcare, Dokuz Eylul University, 35330 Izmir, Turkey
- BioIzmir - Health Technologies Development and Accelerator Research Center, 35330 Izmir, Turkey
| | - Maria Jardim Beira
- CeFEMA - Center of Physics and Engineering of Advanced Materials and Department of Physics, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisbon, Portugal
| | - Mecit Halil Oztop
- Department of Food Engineering, Middle East Technical University, 06800 Ankara, Turkey
| | - Nurettin Sahiner
- Department of Chemistry, Çanakkale Onsekiz Mart University, 17020 Çanakkale, Turkey
- Department of Ophthalmology, Morsani College of Medicine, University of South Florida, 12901 B. Downs Blv., MDC 21, Tampa, Florida 33612, United States
| | - Pedro José Sebastião
- CeFEMA - Center of Physics and Engineering of Advanced Materials and Department of Physics, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisbon, Portugal
| | - Danuta Kruk
- NanoBioMedical Centre, Adam Mickiewicz University, Wszechnicy Piastowskiej 3, 61-614 Poznan, Poland
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Bielejewski M, Rachocki A, Kaszyńska J, Tritt-Goc J. The gelation influence on diffusion and conductivity enhancement effect in renewable ionic gels based on a LMWG. Phys Chem Chem Phys 2018; 20:5803-5817. [DOI: 10.1039/c7cp07740h] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
An enhanced ionic conductivity effect (EICE) in renewable organic ionic gels used to monitor the gel state condition and quality.
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Affiliation(s)
- M. Bielejewski
- Institute of Molecular Physics Polish Academy of Sciences
- 60-179 Poznan
- Poland
| | - A. Rachocki
- Institute of Molecular Physics Polish Academy of Sciences
- 60-179 Poznan
- Poland
| | - J. Kaszyńska
- Institute of Molecular Physics Polish Academy of Sciences
- 60-179 Poznan
- Poland
| | - J. Tritt-Goc
- Institute of Molecular Physics Polish Academy of Sciences
- 60-179 Poznan
- Poland
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Tritt-Goc J, Bielejewski M, Luboradzki R. Interaction of chlorobenzene with gelator in methyl-4,6-O-(p-nitrobenzylidene)-α-d-glucopyranoside gel probed by proton fast field cycling NMR relaxometry. Tetrahedron 2011. [DOI: 10.1016/j.tet.2011.08.040] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Bielejewski M, Tritt-Goc J. Evidence of solvent-gelator interaction in sugar-based organogel studied by field-cycling NMR relaxometry. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2010; 26:17459-17464. [PMID: 20923164 DOI: 10.1021/la103324s] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
The dynamics of bulk toluene and toluene confined in the 1,2-O-(1-ethylpropylidene)-α-D-glucofuranose gel was studied using (1)H field-cycling nuclear magnetic resonance relaxometry. The proton spin-lattice relaxation time T(1) was measured as a function of the magnetic field strength and temperature. The observed dispersion in the frequency range 10(4)-10(6) Hz for the relaxation rate of toluene in the gel system give evidence of the interaction between the toluene and the gelator aggregates. The data were interpreted in terms of the two-fraction fast-exchange model. Additionally it was also shown that a cooling rate during gel preparation process influences the gel microstructure and leads to different gelator-solvent interactions as reflected in a different behavior of the proton spin-lattice relaxation rate of toluene within the gel observed at the low frequency range.
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Affiliation(s)
- Michal Bielejewski
- Institute of Molecular Physics, Polish Academy of Sciences, ul. M. Smoluchowskiego 17, 60-179 Poznań, Poland
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KORB JEANPIERRE, BRYANT ROBERTG. MAGNETIC RELAXATION DISPERSION IN POROUS AND DYNAMICALLY HETEROGENEOUS MATERIALS. ADVANCES IN INORGANIC CHEMISTRY 2005. [DOI: 10.1016/s0898-8838(05)57006-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Korb JP, Godefroy S, Fleury M. Surface nuclear magnetic relaxation and dynamics of water and oil in granular packings and rocks. Magn Reson Imaging 2003; 21:193-9. [PMID: 12850707 DOI: 10.1016/s0730-725x(03)00124-3] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
Low field proton nuclear spin-relaxation at variable magnetic field strength and temperature provides surface dynamical parameters such as surface diffusion coefficients, activation energies, time of residence and coefficient of surface affinity. These parameters were extracted from measurements on grain packs and natural oil-bearing rocks. On grain packs, we show first that changing the amount of surface paramagnetic impurities leads to striking different relationships between the pore-size and the relaxation times T1 and T2. These relationships are well supported by fast-diffusion (surface-limited) or slow-diffusion relaxation models. Surface relaxivity parameters rho1 and rho2 are deduced from the pore size dependence in the fast-diffusion regime. Then, we evidence the frequency and temperature dependence of the surface relaxivity rho1 by field cycling NMR relaxation and relevant theoretical models. The typical frequency dependence found allows an experimental separation of the surface and bulk microdynamics in granular packings and petroleum rocks and the determination of the above mentioned surface dynamical parameters. Finally, we present the first field cycling nuclear spin relaxation experiments performed in water/oil saturated petroleum rocks. We believe that these experiments give new information about the surface localization of these two saturating liquids in pores.
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Affiliation(s)
- J-P Korb
- Laboratoire de Physique de la Matière Condensée, UMR 7643 CNRS, Ecole Polytechnique, 91128 Palaiseau, France.
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Godefroy S, Korb JP, Fleury M, Bryant RG. Surface nuclear magnetic relaxation and dynamics of water and oil in macroporous media. PHYSICAL REVIEW. E, STATISTICAL, NONLINEAR, AND SOFT MATTER PHYSICS 2001; 64:021605. [PMID: 11497601 DOI: 10.1103/physreve.64.021605] [Citation(s) in RCA: 88] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/25/2000] [Revised: 05/14/2001] [Indexed: 05/23/2023]
Abstract
Proton nuclear spin-relaxation studies on water- or oil-saturated granular packings and limestone rocks allow estimating surface molecular dynamical parameters. Measurements were performed at various conditions of temperature, magnetic field strengths, and pore size. We show by low field NMR relaxation that changing the amount of surface paramagnetic impurities leads to striking different pore-size dependences of the relaxation times T1 and T2 of liquids in pores. These dependences are well supported by surface-limited or diffusion-limited relaxation models. Surface relaxivity parameters rho(1) and rho(2) are deduced from the pore-size dependence in the surface-limited regime. We evidence the frequency and temperature dependence of the surface relaxivity rho(1) by field cycling NMR relaxation and relevant theoretical models. The typical frequency dependence found allows an experimental separation of the surface and bulk microdynamics in porous media. Several surface dynamical parameters, such as diffusion coefficients, activation energies, time of residence, and coefficient of surface affinity, were therefore determined. The methods presented here give a powerful analysis of the surface microdynamics of confined liquids, which can be applied to the study of oil-bearing rocks.
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Affiliation(s)
- S Godefroy
- Laboratoire de Physique de la Matière Condensée, UMR 7643 CNRS, Ecole Polytechnique, 91128 Palaiseau, France
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Ceckler T, Maneval J, Melkowits B. Modeling magnetization transfer using a three-pool model and physically meaningful constraints on the fitting parameters. JOURNAL OF MAGNETIC RESONANCE (SAN DIEGO, CALIF. : 1997) 2001; 151:9-27. [PMID: 11444932 DOI: 10.1006/jmre.2001.2326] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
A model for water-macromolecular magnetization transfer is presented which addresses the mechanism of coupling between the hydrogen populations and the extraction of physically meaningful parameters from experimental magnetization transfer data. Both physical exchange between bulk-solvent and site-specific hydration-layer hydrogens and intermolecular magnetic dipolar coupling between these specific hydration-layer-solvent and macromolecular hydrogens are explicitly included, leading to a three-pool model for magnetization transfer. It is shown that the three-pool model is well approximated by a two-pool model for coupling between the bulk-solvent and macromolecular hydrogens when the dipolar-coupled solvent hydrogens are a small fraction of the total solvent, and the solvent-macromolecular coupling constant includes both dipolar magnetic, kappa(dip), and physical exchange, kappa(ex), coupling rates. The model is also extended to multiple solvent systems. The model results in a set of coupled equations that predict magnetization transfer spectra as a function of temperature and composition. Physically meaningful constraints on the coupling and relaxation parameters are established for systems in which magnetization transfer has been observed including solvated cross-linked proteins and lipid bilayers. Using parameter estimates based on these constraints, empirical magnetization transfer spectra are well predicted by the model. It is found that the degree of magnetization transfer becomes independent of kappa(dip) and kappa(ex) when these parameters become greater than about 50 s(-1). In the semi-rigid cross-linked protein systems where the mobility of the macromolecular matrix is insensitive to temperature, the magnitude of the observed magnetization transfer is consistent with being limited by the intermolecular dipolar coupling and spin-lattice relaxation in the bulk-solvent phase.
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Affiliation(s)
- T Ceckler
- Department of Chemistry, Bucknell University, Lewisburg, Pennsylvania 17837, USA.
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Zhang H, Lizitsa N, Bryant RG, Warren WS. Experimental characterization of intermolecular multiple-quantum coherence pumping efficiency in solution NMR. JOURNAL OF MAGNETIC RESONANCE (SAN DIEGO, CALIF. : 1997) 2001; 148:200-208. [PMID: 11133293 DOI: 10.1006/jmre.2000.2195] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
The behavior of intermolecular multiple-quantum coherences in a variety of simple liquids with different chemical and magnetic properties is investigated experimentally and modeled by numerical simulations based on modified Bloch equations. The effects of spin concentration, temperature, intramolecular conformational flexibility, chemical exchange, and spin-spin coupling on the formation of high-order coherences are examined. It is shown that any process that makes the Larmor frequency time-dependent may interfere with the formation of these coherences. Good agreement is achieved between experiments and simulation, using independently known values of the magnetization density, the rate constants for translational diffusion, spin-spin and spin-lattice relaxation, and radiation damping.
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Affiliation(s)
- H Zhang
- Department of Chemistry, University of Virginia, Charlottesville, Virginia, 22901, USA
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Korb JP, Hodges MW, Gobron T, Bryant RG. Anomalous surface diffusion of water compared to aprotic liquids in nanopores. PHYSICAL REVIEW. E, STATISTICAL PHYSICS, PLASMAS, FLUIDS, AND RELATED INTERDISCIPLINARY TOPICS 1999; 60:3097-106. [PMID: 11970117 DOI: 10.1103/physreve.60.3097] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/15/1999] [Indexed: 04/18/2023]
Abstract
1H nuclear magnetic relaxation dispersion experiments show remarkable differences between water and acetone in contact with microporous glass surfaces containing trace paramagnetic impurities. Analyzed with surface relaxation theory on a model porous system, the data obtained for water show that proton surface diffusion limited by chemical exchange with the bulk phase permits long-range effectively one-dimensional exploration along the pores. This magnetic-field dependence coupled with the anomalous temperature dependence of the relaxation rates permits a direct interpretation in terms of the proton translational diffusion coefficient at the surface of the pores. A universal rescaling applied to these data collected for different pore sizes and on a large variety of frequencies and temperatures, supports this interpretation. The analysis demonstrates that acetone diffuses more slowly, which increases the apparent confinement and results in a two-dimensional model for the molecular dynamics close to surface relaxation sinks. Surface-enhanced water proton diffusion, however, permits the proton to explore a greater spatial extent of the pore, which results in an apparent one-dimensional model for the diffusive motions of the water that dominate nuclear spin relaxation.
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Affiliation(s)
- J P Korb
- Laboratoire de Physique de la Matière Condensée, CNRS, Ecole Polytechnique, 91128 Palaiseau, France
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Roose P, Van Craen J, Eisendrath H. Proton spin-lattice relaxation of colloidal silica suspensions in H2O/D2O mixtures. Colloids Surf A Physicochem Eng Asp 1998. [DOI: 10.1016/s0927-7757(98)00654-2] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Korb JP, Hodges MW, Bryant R. Translational diffusion of liquids at surface of microporous materials: new theoretical analysis of field cycling magnetic relaxation measurements. Magn Reson Imaging 1998; 16:575-8. [PMID: 9803912 DOI: 10.1016/s0730-725x(98)00051-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
1H spin-lattice relaxation rates of several aprotic polar liquids on calibrated microporous chromatographic glass beads that have paramagnetic ion impurities are recorded over magnetic field strengths using a field-switched magnetic relaxation dispersion spectrometer. The typical bilogarithmic magnetic field dependence of these rates supports quantitatively our theory of nuclear paramagnetic relaxation and gives the translational diffusion at the surface of nanopores. Our results demonstrate that magnetic relaxation dispersion at low magnetic field strengths in high surface area heterogeneous systems may be quantitatively understood in terms of the parameters of the spatial confinement and the local translational dynamics.
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Affiliation(s)
- J P Korb
- CNRS, Ecole Polytechnique, Palaiseau, France
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