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Metallophthalocyanine-nanofibre-based electrodes for electrochemical sensing of biomolecules

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Abstract

Metal phthalocyanines, possessing rich redox chemistry due to the presence of the central metal cation and pyrrolic nitrogen atoms of the macrocycle, are explored as electrochemical sensors. Nickel phthalocyanine nanofibres (NiPc NF) prepared by a simple chemical route are coated on a pencil graphite rod and the electrocatalytic performance of NiPc NF electrode is investigated for quantitative detection of ascorbic acid (AA) in 0.2 M phosphate buffer solution. The performance of NiPc NFs is shown to be superior to that of commercial NiPc and is attributed to the high electrochemically active surface area available for fibres. The electrode exhibits linearity for the detection over a wide concentration range of AA from \(5.5\,\upmu \hbox {M}\) to 5.2 mM. The detection limit for AA sensing with NiPc-NF-modified electrode is \(1.5\,\upmu \hbox {M}\). The higher performance of NiPc fibres due to its nanostructure morphology may be utilized for the quantitative detection of other biomolecules.

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Acknowledgements

We acknowledge financial assistance from DST FastTrack Project No. SR/FT/CS-170/2011.

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Authors and Affiliations

  1. Centre for Nano and Soft Matter Sciences, Jalahalli, Bangalore, 560 013, India

    K Priya Madhuri & Neena S John

  2. Department of Chemistry, Mangalore University, Mangalagangotri, 574 199, India

    K Priya Madhuri

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  1. K Priya Madhuri
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  2. Neena S John
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Correspondence to Neena S John.

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Madhuri, K.P., John, N.S. Metallophthalocyanine-nanofibre-based electrodes for electrochemical sensing of biomolecules. Bull Mater Sci 41, 118 (2018). https://doi.org/10.1007/s12034-018-1636-9

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  • DOI: https://doi.org/10.1007/s12034-018-1636-9

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