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Hybrid Organic-Inorganic Electrode-Membranes Based on Organo-Polysiloxane/Macrocycle Systems

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Abstract

Specific complexing agents for alkaline ions such as some crown-ethers of different intramolecular cavity size (12-crown-4, 15-crown-5 and 18-crown-6) are incorporated into a organo-polyorganosiloxane network generated via the sol-gel process. The resulting xerogels embody macrocycle compounds with different ion-selectivity. These xerogels are deposited onto porous supports (borosilicate, polyacrylonitrile, … ) to obtain new composite electrode- membranes. The electrochemical characterization of the membranes and the electrode- membranes by electrochemical impedance spectroscopy (EIS) shows information about the reversible behavior and the ion resistance of the membranes, which are a function of both, nature and content of the entrapped macrocycle as well as the salt solution concentration. The electrochemical response of these systems acting as electrode-membranes shows their sensitivity towards different metal ions at variable concentrations.

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Authors and Affiliations

  1. Instituto de Ciencia de Materiales de Madrid, CSIC, Cantoblanco, E-28049, Madrid, Spain

    A. Jiménez-Morales, J. C. Galvan, P. Aránda & E. Ruiz-Hitzky

  2. Universidad Carlos III de Madrid, E-289 11, Legands, Spain

    A. Jiménez-Morales

Authors
  1. A. Jiménez-Morales
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  2. J. C. Galvan
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  3. P. Aránda
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  4. E. Ruiz-Hitzky
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Correspondence to A. Jiménez-Morales.

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Jiménez-Morales, A., Galvan, J.C., Aránda, P. et al. Hybrid Organic-Inorganic Electrode-Membranes Based on Organo-Polysiloxane/Macrocycle Systems. MRS Online Proceedings Library 519, 211–216 (1998). https://doi.org/10.1557/PROC-519-211

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  • DOI: https://doi.org/10.1557/PROC-519-211

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