Вплив дисперсійного середовища на кластерізацію води та перекису водню, зв’язаних в композиті кремнезем-сорбіт
The interfacial behavior of water and hydrogen peroxide in solution alone or adsorbed on a surface of nanosilica A-400, silica gel Si-60 or composite prepared using mechanochemical activation of sorbitol – nanosilica A-300 has been studied by low-temperature 1H NMR spectroscopy. It has been shown th...
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| Date: | 2013 |
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| Main Authors: | , , , , |
| Format: | Article |
| Language: | Russian |
| Published: |
Chuiko Institute of Surface Chemistry National Academy of Sciences of Ukraine
2013
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| Online Access: | https://www.cpts.com.ua/index.php/cpts/article/view/249 |
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| Journal Title: | Chemistry, Physics and Technology of Surface |
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Chemistry, Physics and Technology of Surface| Summary: | The interfacial behavior of water and hydrogen peroxide in solution alone or adsorbed on a surface of nanosilica A-400, silica gel Si-60 or composite prepared using mechanochemical activation of sorbitol – nanosilica A-300 has been studied by low-temperature 1H NMR spectroscopy. It has been shown that water in the hydrogen peroxide solution forms clusters of average radius R » 1 nm. At a surface of nanosilica, water forms clusters at R < 0.8 nm and domains at R = 2–50 nm. For the solution bound to the A-300/sorbitol composite, two main signals appear in the spectra at the chemical shift of 4 and 6 ppm corresponding to structures of strongly associated water dissolved different amounts of H2O2. In this case, the formation of domains is preferable at R » 50 nm. Addition of polar solvents (CD3CN, DMSO) leads to the formation of clusters including H2O – electron-donor complexes. |
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