Novel pH sensing redox wire based on a polyamide homopolymer of L-tryptophan

A McLister, N Lowry, A Anderson, J McHugh, J Davis

    Research output: Contribution to journalArticle

    2 Citations (Scopus)

    Abstract

    The redox profile obtained from an electrochemically oxidised polyamide homopolymer containing L-tryptophan is shown to serve as a versatile molecular wire for monitoring pH. The transformation of the polypeptide is examined and the optimisation of the electrode-redox wire interface was conducted in order to enhance the electrochemical signature. Voltammetric interrogation of the modified polymer reveals the creation of quinoid functionality which can be efficiently addressed through interaction with nanofractured carbon surfaces. Preliminary voltammetric and XPS characterisation was conducted and a Nernstian response (−0.060 V/pH) was observed (pH 3–8) and as such could be used as a key component in the design of new pH probes.
    LanguageEnglish
    Pages2294-2297
    JournalFibers and Polymers
    Volume16
    Publication statusPublished - 1 Oct 2015

    Fingerprint

    Nylons
    Homopolymerization
    Tryptophan
    Wire
    Polymers
    Carbon
    X ray photoelectron spectroscopy
    Peptides
    Electrodes
    Monitoring
    Oxidation-Reduction

    Keywords

    • Electrode
    • pH
    • sensor
    • tryptophan

    Cite this

    McLister, A., Lowry, N., Anderson, A., McHugh, J., & Davis, J. (2015). Novel pH sensing redox wire based on a polyamide homopolymer of L-tryptophan. Fibers and Polymers, 16, 2294-2297.
    McLister, A ; Lowry, N ; Anderson, A ; McHugh, J ; Davis, J. / Novel pH sensing redox wire based on a polyamide homopolymer of L-tryptophan. In: Fibers and Polymers. 2015 ; Vol. 16. pp. 2294-2297.
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    McLister, A, Lowry, N, Anderson, A, McHugh, J & Davis, J 2015, 'Novel pH sensing redox wire based on a polyamide homopolymer of L-tryptophan', Fibers and Polymers, vol. 16, pp. 2294-2297.

    Novel pH sensing redox wire based on a polyamide homopolymer of L-tryptophan. / McLister, A; Lowry, N; Anderson, A; McHugh, J; Davis, J.

    In: Fibers and Polymers, Vol. 16, 01.10.2015, p. 2294-2297.

    Research output: Contribution to journalArticle

    TY - JOUR

    T1 - Novel pH sensing redox wire based on a polyamide homopolymer of L-tryptophan

    AU - McLister, A

    AU - Lowry, N

    AU - Anderson, A

    AU - McHugh, J

    AU - Davis, J

    PY - 2015/10/1

    Y1 - 2015/10/1

    N2 - The redox profile obtained from an electrochemically oxidised polyamide homopolymer containing L-tryptophan is shown to serve as a versatile molecular wire for monitoring pH. The transformation of the polypeptide is examined and the optimisation of the electrode-redox wire interface was conducted in order to enhance the electrochemical signature. Voltammetric interrogation of the modified polymer reveals the creation of quinoid functionality which can be efficiently addressed through interaction with nanofractured carbon surfaces. Preliminary voltammetric and XPS characterisation was conducted and a Nernstian response (−0.060 V/pH) was observed (pH 3–8) and as such could be used as a key component in the design of new pH probes.

    AB - The redox profile obtained from an electrochemically oxidised polyamide homopolymer containing L-tryptophan is shown to serve as a versatile molecular wire for monitoring pH. The transformation of the polypeptide is examined and the optimisation of the electrode-redox wire interface was conducted in order to enhance the electrochemical signature. Voltammetric interrogation of the modified polymer reveals the creation of quinoid functionality which can be efficiently addressed through interaction with nanofractured carbon surfaces. Preliminary voltammetric and XPS characterisation was conducted and a Nernstian response (−0.060 V/pH) was observed (pH 3–8) and as such could be used as a key component in the design of new pH probes.

    KW - Electrode

    KW - pH

    KW - sensor

    KW - tryptophan

    M3 - Article

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    JO - Fibers and Polymers

    T2 - Fibers and Polymers

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    McLister A, Lowry N, Anderson A, McHugh J, Davis J. Novel pH sensing redox wire based on a polyamide homopolymer of L-tryptophan. Fibers and Polymers. 2015 Oct 1;16:2294-2297.