Interaction of beta-cyclodextrin with cadmium(II) ions |
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| Authors: | Norkus Eugenijus Grinciene Giedre Vuorinen Tapani Vaitkus Rimantas Butkus Eugenijus |
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| Institution: | Institute of Chemistry, Laboratory of Catalysis, A. Gostauto 9, Vilnius LT-2600, Lithuania. norkus@ktl.mii.lt |
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| Abstract: | Reduction of Cd(II) on a dropping mercury electrode was used to study interaction of β-cyclodextrin with Cd(II) ions. It was found that Cd(II) forms Cdβ-CD(OH)22− hydroxy-complex with the anion of β-cyclodextrin in alkaline solutions (pH>11), the logarithm of stability constant being 10.4±0.1 (20 °C; I=1.0). The calculated value of the diffusion coefficient equal to 1.0×10−6 cm2/s shows a large size Cd(II) complex species formation in alkaline solutions containing β-CD. |
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| Keywords: | β-Cyclodextrin Cadmium(II) Complex formation |
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