Properties of silicas chemically modified by monodentate amines studied by conductometry |
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| Authors: | V. N. Zaitsev N. G. Kobylinskaya |
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| Affiliation: | (1) Department of Chemistry, Taras Shevchenko National University, 64 ul. Vladimirskaya, 01033 Kiev, Ukraine |
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| Abstract: | The protonation of aminoalkyl groups covalently bonded on the silica surface was studied by the conductometric titration method. Porous varieties of silica can adsorb HCl from an aqueous solution. Conductometric titration was proposed for the determination of concentrations and constants of protolytic equilibrium of grafted amino groups. During HCl chemisorption the effect of temperature on the electric conductivity of suspensions of the modified silicas was studied. __________ Published in Russian in Izvestiya Akademii Nauk. Seriya Khimicheskaya, No. 8, pp. 1789–1793, August, 2005. |
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| Keywords: | conductometry aminosilicas concentration of immobilized groups adsorption equilibrium constant protonation |
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