Radicals on the silica surface: probes for studying dynamics by means of fast field cycling relaxometry and dynamic nuclear polarization
Determining the dynamics of adsorbed liquids on nanoporous materials is crucial for a detailed understanding of interactions and processes on the solid-liquid interface in many materials and porous systems. Knowledge of the influence of the presence of paramagnetic species on the surface or within t...
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| Format: | Article |
| Language: | English |
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KeAi Communications Co. Ltd.
2023-08-01
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| Series: | Magnetic Resonance Letters |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2772516223000189 |
| _version_ | 1797729827006971904 |
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| author | Bulat Gizatullin Carlos Mattea Siegfried Stapf |
| author_facet | Bulat Gizatullin Carlos Mattea Siegfried Stapf |
| author_sort | Bulat Gizatullin |
| collection | DOAJ |
| description | Determining the dynamics of adsorbed liquids on nanoporous materials is crucial for a detailed understanding of interactions and processes on the solid-liquid interface in many materials and porous systems. Knowledge of the influence of the presence of paramagnetic species on the surface or within the porous matrices is essential for fundamental studies and industrial processes such as catalysts. Magnetic resonance methods, such as electron paramagnetic resonance (EPR), nuclear magnetic resonance (NMR) and dynamic nuclear polarization (DNP), are powerful tools to address these questions and to quantify dynamics, electron-nuclear interaction features and their relation to the physical-chemical parameters of the system. This paper presents an NMR study of the dynamics of polar and nonpolar adsorbed liquids, represented by water, n-decane, deuterated water and nonane-d20, on the native silica surface as well as silica modified with vanadyl porphyrins. The analysis of the frequency dependence of the nuclear spin-lattice relaxation time is carried out by separating the intra- and intermolecular contributions, which were analyzed using reorientations mediated by translational displacements (RMTD) and force-free-hard-sphere (FFHS) models, respectively. |
| first_indexed | 2024-03-12T11:35:19Z |
| format | Article |
| id | doaj.art-4105824156a14b5084665f496c99ddf4 |
| institution | Directory Open Access Journal |
| issn | 2772-5162 |
| language | English |
| last_indexed | 2024-03-12T11:35:19Z |
| publishDate | 2023-08-01 |
| publisher | KeAi Communications Co. Ltd. |
| record_format | Article |
| series | Magnetic Resonance Letters |
| spelling | doaj.art-4105824156a14b5084665f496c99ddf42023-09-01T05:03:23ZengKeAi Communications Co. Ltd.Magnetic Resonance Letters2772-51622023-08-0133256265Radicals on the silica surface: probes for studying dynamics by means of fast field cycling relaxometry and dynamic nuclear polarizationBulat Gizatullin0Carlos Mattea1Siegfried Stapf2Corresponding author. Department of Technical Physics II, TU Ilmenau, PO Box 100 565, Ilmenau, 98684, Germany.; Department of Technical Physics II, TU Ilmenau, PO Box 100 565, Ilmenau, 98684, GermanyDepartment of Technical Physics II, TU Ilmenau, PO Box 100 565, Ilmenau, 98684, GermanyDepartment of Technical Physics II, TU Ilmenau, PO Box 100 565, Ilmenau, 98684, GermanyDetermining the dynamics of adsorbed liquids on nanoporous materials is crucial for a detailed understanding of interactions and processes on the solid-liquid interface in many materials and porous systems. Knowledge of the influence of the presence of paramagnetic species on the surface or within the porous matrices is essential for fundamental studies and industrial processes such as catalysts. Magnetic resonance methods, such as electron paramagnetic resonance (EPR), nuclear magnetic resonance (NMR) and dynamic nuclear polarization (DNP), are powerful tools to address these questions and to quantify dynamics, electron-nuclear interaction features and their relation to the physical-chemical parameters of the system. This paper presents an NMR study of the dynamics of polar and nonpolar adsorbed liquids, represented by water, n-decane, deuterated water and nonane-d20, on the native silica surface as well as silica modified with vanadyl porphyrins. The analysis of the frequency dependence of the nuclear spin-lattice relaxation time is carried out by separating the intra- and intermolecular contributions, which were analyzed using reorientations mediated by translational displacements (RMTD) and force-free-hard-sphere (FFHS) models, respectively.http://www.sciencedirect.com/science/article/pii/S2772516223000189NMR relaxationFast field cyclingPorous mediaDNPPorphyrins |
| spellingShingle | Bulat Gizatullin Carlos Mattea Siegfried Stapf Radicals on the silica surface: probes for studying dynamics by means of fast field cycling relaxometry and dynamic nuclear polarization Magnetic Resonance Letters NMR relaxation Fast field cycling Porous media DNP Porphyrins |
| title | Radicals on the silica surface: probes for studying dynamics by means of fast field cycling relaxometry and dynamic nuclear polarization |
| title_full | Radicals on the silica surface: probes for studying dynamics by means of fast field cycling relaxometry and dynamic nuclear polarization |
| title_fullStr | Radicals on the silica surface: probes for studying dynamics by means of fast field cycling relaxometry and dynamic nuclear polarization |
| title_full_unstemmed | Radicals on the silica surface: probes for studying dynamics by means of fast field cycling relaxometry and dynamic nuclear polarization |
| title_short | Radicals on the silica surface: probes for studying dynamics by means of fast field cycling relaxometry and dynamic nuclear polarization |
| title_sort | radicals on the silica surface probes for studying dynamics by means of fast field cycling relaxometry and dynamic nuclear polarization |
| topic | NMR relaxation Fast field cycling Porous media DNP Porphyrins |
| url | http://www.sciencedirect.com/science/article/pii/S2772516223000189 |
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