Acid-base properties of poly(1-vinylazoles) in aqueous solution |
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| Authors: | Mazyar N L Annenkov V V Kruglova V A Anan'ev S M Danilovtseva E N Rokhin A V Zinchenko S V |
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| Institution: | (1) Irkutsk Institute of Chemistry, Siberian Branch, Russian Academy of Sciences, 1 ul. Favorskogo, 664033 Irkutsk, Russian Federation;(2) Department of Chemistry, Irkutsk State University, 126 ul. Lermontova, 664033 Irkutsk, Russian Federation |
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| Abstract: | The interaction of poly(1-vinylimidazole) and poly(1-vinyl-1,2,4-triazole) with HCl and alkalies in aqueous and water-salt solutions was investigated by potentiometric titration, viscosimetry, 1H and 13C NMR, and UV spectroscopy. The effect of the nature and concentration of low-molecular counterions was found. The interaction of poly(1-vinylazoles) with the acid results in the protonation of the azole cycle. The interaction of poly(1-vinylazoles) with alkalies is stipulated by the capability of the pyridine N atom of forming a coordination bond with the metal ion and that of the unsaturated pi-system of the heterocycle of coordinating with the anions. |
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| Keywords: | poly(1-vinylazoles) poly(1-vinylimidazole) poly(1-vinyl-1 2 4-triazole) acid-base properties |
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