Electrochemical study on the selective formation of [Pb(cyclodextrin)]surface inclusion complexes at the carbon paste electrode/ClO4 1 M interphase |
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| Authors: | Gabriela Roa-Morales Alberto Rojas-Hernández |
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| Affiliation: | a Universidad Autónoma Metropolitana-Iztapalapa, Apdo. Postal 55-534, 09340 México D.F., Mexico
b Universidad Autónoma del Estado de México, Facultad de Química, Área de Ciencias Ambientales, Paseo Colon intersección Paseo Tollocan s/n C.P. 50120, Toluca, Estado de México, Mexico |
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| Abstract: | The formation constants of surface inclusion complexes were determined using a carbon paste electrode, CPE, and cyclic voltammetry for aqueous-based media containing Pb(II) and α, β and γ cyclodextrins. In order to promote the occupation of the molecular cavities in the cyclodextrins, the medium with the support electrolyte contained ClO4− ions, which have the capacity to modify the hydrophobic properties of such cavities. The results obtained were: Pb(II)-αCDK = 883.7 ± 13.6 M−1, Pb(II)-βCDK = 727.5 ± 20.2 M−1, Pb(II)-γCDK = 782 ± 10.7 M−1. |
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| Keywords: | Cyclodextrin Surface inclusion complex |
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