Facile determination of the degree of modification of ordered mesoporous silica by liquid phase NMR
| Autor: | Frank Schroeter, Andreas Georg Thome, Jatuporn Wittayakun, Patrick Bottke, Frank Roessner |
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| Rok vydání: | 2019 |
| Předmět: |
Materials science
Small volume Liquid phase 02 engineering and technology General Chemistry Mesoporous silica 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences 0104 chemical sciences Degree (temperature) Silanol chemistry.chemical_compound Adsorption chemistry Chemical engineering Mechanics of Materials General Materials Science 0210 nano-technology |
| Zdroj: | Microporous and Mesoporous Materials. 274:342-346 |
| ISSN: | 1387-1811 |
| Popis: | A new and facile analytical method to assess the amount of organic groups that are linked to the surface of ordered mesoporous silica (OMS) is proposed. The quantity of adsorbed compounds on OMS could also be studied as well as the amount of silanol groups within certain limits. A small amount of the OMS of interest is dissolved in a small volume of NaOD in D2O and a defined amount of a reference compound is added. Subsequently, the solution is analyzed by liquid phase NMR. The degree of modification can be inferred quantitatively from the 1H-spectrum. The high accuracy and the analysis time compared to solid-state 1H and 13C MAS NMR are the main benefits of this method. The findings are correlated with XRD, N2-sorption, DRIFTS, TGA and MAS NMR data. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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