Surface Enhanced DNP Assisted Solid-State NMR of Functionalized SiO2 Coated Polycarbonate Membranes

Kumari, Bharti ; John, Daniel ; Hoffmann, Paul ; Spende, Anne ; Toimil-Molares, Maria Eugenia ; Trautmann, Christina ; Hess, Christian ; Ruff, Philip ; Schulze, Marcus ; Stark, Robert ; Buntkowsky, Gerd ; Andrieu-Brunsen, Annette ; Gutmann, Torsten :
Surface Enhanced DNP Assisted Solid-State NMR of Functionalized SiO2 Coated Polycarbonate Membranes.
[Online-Edition: https://doi.org/10.1515/zpch-2017-1032]
In: Zeitschrift für Physikalische Chemie, 232 (7-8) Ahead of Print. ISSN 0942-9352
[Artikel] , (2018)

Offizielle URL: https://doi.org/10.1515/zpch-2017-1032

Kurzbeschreibung (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.

Typ des Eintrags:	Artikel
Erschienen:	2018
Autor(en):	Kumari, Bharti ; John, Daniel ; Hoffmann, Paul ; Spende, Anne ; Toimil-Molares, Maria Eugenia ; Trautmann, Christina ; Hess, Christian ; Ruff, Philip ; Schulze, Marcus ; Stark, Robert ; Buntkowsky, Gerd ; Andrieu-Brunsen, Annette ; Gutmann, Torsten
Titel:	Surface Enhanced DNP Assisted Solid-State NMR of Functionalized SiO2 Coated Polycarbonate Membranes
Sprache:	Englisch
Kurzbeschreibung (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.
Titel der Zeitschrift, Zeitung oder Schriftenreihe:	Zeitschrift für Physikalische Chemie
Band:	232
(Heft-)Nummer:	7-8
Verlag:	de Gruyter
Freie Schlagworte:	dynamic nuclear polarization, etched ion-track membranes, silica coating, solid-state NMR, surface analysis
Fachbereich(e)/-gebiet(e):	11 Fachbereich Material- und Geowissenschaften 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Ionenstrahlmodifizierte Materialien 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Physics of Surfaces 07 Fachbereich Chemie 07 Fachbereich Chemie > Fachgebiet Makromolekulare Chemie 07 Fachbereich Chemie > Fachgebiet Physikalische Chemie
Hinterlegungsdatum:	28 Mai 2018 05:39
DOI:	10.1515/zpch-2017-1032
Offizielle URL:	https://doi.org/10.1515/zpch-2017-1032
Sponsoren:	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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