Vyalikh, A. ; Emmler, T. ; Grünberg, B. ; Xu, Y. ; Shenderovich, I. ; Findenegg, G. H. ; Limbach, H. H. ; Buntkowsky, G. (2007)
Hydrogen bonding of water confined in controlled-pore glass 10-75 studied by H-1-solid state NMR.
In: Zeitschrift Fur Physikalische Chemie-International Journal of Research in Physical Chemistry & Chemical Physics, 221 (1)
Artikel, Bibliographie
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Kurzbeschreibung (Abstract)
The adsorption of water in the mesoporous silica material with cylindrical pores of uniform diameter, Controlled Pore Glass 10-75 (CPG), was studied by H-1-MAS solid state NMR spectroscopy. From the NMR spectra it is evident that inside the mesopores of the silica different water environments exist, which are characterized by their individual chemical shift. All observed hydrogen atoms are either surface -SiOH groups or hydrogen bonded water molecules. It is found that there exist some stronger bound water molecules on the surface which are not removable even by heating at a vacuum pump. As a tentative assignment these water molecules are attributed to surface defects or inaccessible cavities in the CPG 10-75. At intermediate water filling levels, the principal signal is a single NMR line with continuously varying chemical shift. This finding is interpreted as the result of a radial water filling mechanism. That is, the filling of the pore grows from the pore surface towards the pore axis. Finally it is shown that water is a sensor for surface and structural inhomogeneity and that a coexistence of inner pore and outer bulk water exists in the system.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2007 |
| Autor(en): | Vyalikh, A. ; Emmler, T. ; Grünberg, B. ; Xu, Y. ; Shenderovich, I. ; Findenegg, G. H. ; Limbach, H. H. ; Buntkowsky, G. |
| Art des Eintrags: | Bibliographie |
| Titel: | Hydrogen bonding of water confined in controlled-pore glass 10-75 studied by H-1-solid state NMR |
| Sprache: | Englisch |
| Publikationsjahr: | 2007 |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Zeitschrift Fur Physikalische Chemie-International Journal of Research in Physical Chemistry & Chemical Physics |
| Jahrgang/Volume einer Zeitschrift: | 221 |
| (Heft-)Nummer: | 1 |
| URL / URN: | http://apps.webofknowledge.com/full_record.do?product=WOS&se... |
| Zugehörige Links: | |
| Kurzbeschreibung (Abstract): | The adsorption of water in the mesoporous silica material with cylindrical pores of uniform diameter, Controlled Pore Glass 10-75 (CPG), was studied by H-1-MAS solid state NMR spectroscopy. From the NMR spectra it is evident that inside the mesopores of the silica different water environments exist, which are characterized by their individual chemical shift. All observed hydrogen atoms are either surface -SiOH groups or hydrogen bonded water molecules. It is found that there exist some stronger bound water molecules on the surface which are not removable even by heating at a vacuum pump. As a tentative assignment these water molecules are attributed to surface defects or inaccessible cavities in the CPG 10-75. At intermediate water filling levels, the principal signal is a single NMR line with continuously varying chemical shift. This finding is interpreted as the result of a radial water filling mechanism. That is, the filling of the pore grows from the pore surface towards the pore axis. Finally it is shown that water is a sensor for surface and structural inhomogeneity and that a coexistence of inner pore and outer bulk water exists in the system. |
| Freie Schlagworte: | hydrogen bonding water controlled pore glass 1h-nmr spectroscopy pore condensation mesoporous silica porous silica rabbit lens x-ray molecules h-1-nmr sba-15 mcm-41 ice diffraction |
| Zusätzliche Informationen: | 131ME Times Cited:21 Cited References Count:34 |
| Fachbereich(e)/-gebiet(e): | 07 Fachbereich Chemie 07 Fachbereich Chemie > Eduard Zintl-Institut 07 Fachbereich Chemie > Eduard Zintl-Institut > Fachgebiet Physikalische Chemie |
| Hinterlegungsdatum: | 27 Okt 2014 20:52 |
| Letzte Änderung: | 03 Jul 2024 02:22 |
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| Suche nach Titel in: | TUfind oder in Google |
Verfügbare Versionen dieses Eintrags
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Hydrogen Bonding of Water Confined in Controlled-Pore Glass 10-75 Studied by ¹H-Solid State NMR. (deposited 01 Okt 2021 11:33)
- Hydrogen bonding of water confined in controlled-pore glass 10-75 studied by H-1-solid state NMR. (deposited 27 Okt 2014 20:52) [Gegenwärtig angezeigt]
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