Kumari, Bharti and John, Daniel and Hoffmann, Paul and Spende, Anne and Toimil-Molares, Maria Eugenia and Trautmann, Christina and Hess, Christian and Ruff, Philip and Schulze, Marcus and Stark, Robert and Buntkowsky, Gerd and Andrieu-Brunsen, Annette and Gutmann, Torsten (2018):
Surface Enhanced DNP Assisted Solid-State NMR of Functionalized SiO2 Coated Polycarbonate Membranes.
In: Zeitschrift für Physikalische Chemie, 232 (7-8), de Gruyter, pp. 1173-1186, ISSN 0942-9352,
DOI: 10.1515/zpch-2017-1032,
[Online-Edition: https://doi.org/10.1515/zpch-2017-1032],
[Article]
Abstract
Surface enhanced solid-state NMR by dynamic nuclear polarization (DNP SENS) enables the characterization of the inner-pore surface functionalization of porous etched ion-track membranes exhibiting low specific surface areas compared to typical SBA- or MCM-type mesoporous silica materials. The membranes were conformally coated with a 5 nm thin SiO2 layer by atomic layer deposition. This layer was subsequently modified by aminopropyl silane linkers that allow further functionalization via the terminal amine group. The results evidence that in principle DNP SENS is a capable tool to analyze more complex porous systems, e.g. bioinspired functional etched ion-track membranes down to the molecular level. These results are relevant also for single nanopore systems, for which a direct analysis of the channel surface functionalization is not feasible by classical characterization methods. The applicability of DNP SENS to complex porous systems requires the optimization of the sample preparation and measurement parameters.
| Item Type: | Article |
|---|---|
| Erschienen: | 2018 |
| Creators: | Kumari, Bharti and John, Daniel and Hoffmann, Paul and Spende, Anne and Toimil-Molares, Maria Eugenia and Trautmann, Christina and Hess, Christian and Ruff, Philip and Schulze, Marcus and Stark, Robert and Buntkowsky, Gerd and Andrieu-Brunsen, Annette and Gutmann, Torsten |
| Title: | Surface Enhanced DNP Assisted Solid-State NMR of Functionalized SiO2 Coated Polycarbonate Membranes |
| Language: | English |
| Abstract: | Surface enhanced solid-state NMR by dynamic nuclear polarization (DNP SENS) enables the characterization of the inner-pore surface functionalization of porous etched ion-track membranes exhibiting low specific surface areas compared to typical SBA- or MCM-type mesoporous silica materials. The membranes were conformally coated with a 5 nm thin SiO2 layer by atomic layer deposition. This layer was subsequently modified by aminopropyl silane linkers that allow further functionalization via the terminal amine group. The results evidence that in principle DNP SENS is a capable tool to analyze more complex porous systems, e.g. bioinspired functional etched ion-track membranes down to the molecular level. These results are relevant also for single nanopore systems, for which a direct analysis of the channel surface functionalization is not feasible by classical characterization methods. The applicability of DNP SENS to complex porous systems requires the optimization of the sample preparation and measurement parameters. |
| Journal or Publication Title: | Zeitschrift für Physikalische Chemie |
| Volume: | 232 |
| Number: | 7-8 |
| Publisher: | de Gruyter |
| Uncontrolled Keywords: | dynamic nuclear polarization, etched ion-track membranes, silica coating, solid-state NMR, surface analysis |
| Divisions: | 11 Department of Materials and Earth Sciences 11 Department of Materials and Earth Sciences > Material Science 11 Department of Materials and Earth Sciences > Material Science > Ion-Beam-Modified Materials 11 Department of Materials and Earth Sciences > Material Science > Physics of Surfaces 07 Department of Chemistry 07 Department of Chemistry > Fachgebiet Makromolekulare Chemie 07 Department of Chemistry > Physical Chemistry |
| Date Deposited: | 28 May 2018 05:39 |
| DOI: | 10.1515/zpch-2017-1032 |
| Official URL: | https://doi.org/10.1515/zpch-2017-1032 |
| Funders: | This work has been supported by the DFG under contract Bu 911/20-1 (DNP spectrometer) and FOR1583 Grant Nos. Bu 911-18-2, HE 4515/4-2., The authors further thank the project iNAPO by the Hessen State Ministry of Higher Education, Research and the Arts for financial support. |
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