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    Electrochemical Characterisation of Polypyrrole Doped with p-Sulfonatocalix[4]arene


    Doyle, Richard and Breslin, Carmel B. and Power, Orla and Rooney, A. Denise (2012) Electrochemical Characterisation of Polypyrrole Doped with p-Sulfonatocalix[4]arene. Electroanalysis, 24 (2). pp. 293-302. ISSN 1040-0397

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    Abstract

    Polypyrrole (PPy) films doped with macrocyclic calixarene anions are attractive materials for the development of selective sensor materials and membrane systems as the incorporation of the macrocycles can confer specific recognition sites within the polymer matrix. However, unlike many other PPy films a calixarene-doped system is more complicated as calixarenes are themselves electroactive. Here we present results on the electroactivity, impedance properties and morphology of polypyrrole doped with p-sulfonatocalix[4]arene. The calixarene in the polymer was found to be irreversibly oxidised at potentials greater than 0.500 V vs. SCE and reacted to form a new redox active species that was trapped within the polymer matrix. The results from the impedance and EQCM studies indicated that the calixarene was permanently trapped within the polymer matrix and the polymer acted as a cation exchange material. In addition, the data acquired from the EQCM experiments showed that while the material displayed simple cation exchange properties at high scan rates, at lower scan rates the transport of neutral species was also observed. Overall, our findings indicate that the PPy-C4S system is suitable for use as a stable conducting polymer doped with an immobile anion within the potential window of −0.800 V to 0.500 V vs. SCE.

    Item Type: Article
    Keywords: Sulfonated calixarene; Polypyrrole; Cation exchange material; EQCM; Electrochemical impedance spectroscopy;
    Academic Unit: Faculty of Science and Engineering > Chemistry
    Item ID: 7813
    Identification Number: https://doi.org/10.1002/elan.201100458
    Depositing User: Dr. Denise Rooney
    Date Deposited: 25 Jan 2017 14:58
    Journal or Publication Title: Electroanalysis
    Publisher: Wiley
    Refereed: Yes
    Funders: Science, Technology, Research and Innovation for the Environment (STRIVE) Programme 2007–2013, nvironmental Protection Agency (EPA), Irish Research Council for Science Engineering and Technology (IRCSET), John & Pat Hume Scholarship, NUI Maynooth
    URI:

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