Investigation of the local environment of aminodiphosphonic acid covalently immobilized on silica surface by XPS and solid-state 31P NMR
| Autor: | Sergei Alekseev, L. S. Kostenko, Jacques Fraissard, Volodymyr Zaitsev, A. S. Andreev |
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| Rok vydání: | 2016 |
| Předmět: |
Materials science
Analytical chemistry Formaldehyde 02 engineering and technology Surfaces and Interfaces Nuclear magnetic resonance spectroscopy 010402 general chemistry 021001 nanoscience & nanotechnology Resonance (chemistry) 01 natural sciences 0104 chemical sciences Surfaces Coatings and Films NMR spectra database chemistry.chemical_compound Colloid and Surface Chemistry chemistry X-ray photoelectron spectroscopy Solid-state nuclear magnetic resonance Yield (chemistry) Materials Chemistry Ceramics and Composites Local environment Physical and Theoretical Chemistry 0210 nano-technology |
| Zdroj: | Himia, Fizika ta Tehnologia Poverhni. 7:20-30 |
| ISSN: | 2079-1704 |
| Popis: | The samples of silicas with covalently-immobilized aminodiphosphonic acid (SiO 2 –АDPA) have been characterized by the XPS and solid state 31 P NMR spectroscopy. The samples were synthesized via Kabachnik-Fields reaction from aminopropyl silica gel, H 3 PO 3 and formaldehyde, and have different concentrations (0.33–1.67 mmol/m 2 ) of grafted groups and different yield (59–86%). It is demonstrated that chemical shift of the lines and number of resonance lines in the 31 P NMR spectra of SiO 2 –АDPA depends on both the concentration of bonded groups and the yield. This difference was interpreted as a result of heterogeneity in the local environment of SiO 2 –АDPA surface. |
| Databáze: | OpenAIRE |
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