Дослідження адсорбції акридину і профлавіну на поверхні кремнезему
The adsorption has been studied of acrydine and proflavine onto superfine silica surface from aqueous solutions as dependent on pH and ionic strength values. The stability constants have been evaluated of acrydine surface complexes with both non-ionized and ionized silanol groups of silica within th...
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| Datum: | 2012 |
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| Hauptverfasser: | , , , , , |
| Format: | Artikel |
| Sprache: | Russisch |
| Veröffentlicht: |
Chuiko Institute of Surface Chemistry National Academy of Sciences of Ukraine
2012
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| Online Zugang: | https://www.cpts.com.ua/index.php/cpts/article/view/156 |
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| Назва журналу: | Chemistry, Physics and Technology of Surface |
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Chemistry, Physics and Technology of Surface| Zusammenfassung: | The adsorption has been studied of acrydine and proflavine onto superfine silica surface from aqueous solutions as dependent on pH and ionic strength values. The stability constants have been evaluated of acrydine surface complexes with both non-ionized and ionized silanol groups of silica within the framework of the electrostatic model of complex formation on solid surface. The energies of proton transfer from (H2O)4 hydrate associate or silica surface to molecules of studied acridines have been calculated by means of quantum chemistry what gives us an opportunity to elucidate the types of protonation sites in these compounds. The formation energies for the adsorption complexes, wavelengths and oscillator strengths for electron transitions within the optical range for both molecular and ionized forms of proflavine in aqueous solution and of that adsorbed on silica surface have been evaluated. |
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