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Derivatization and characterization of functionalized carbon powder via diazonium salt reduction

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Abstract

Chemical reduction of 4-chloro-2-nitrobenzenediazonium chloride salt in the presence of hypophosphorous acid and carbon powder results in functionalized carbon powder with chloronitrophenyl groups attached on carbon particle surface. This type of bulk derivatization protocol is very useful and most inexpensive compared to widely used electrochemically assisted derivatization protocol. The derivatized carbon powder has been characterized by studying its Fourier transform infrared spectroscopy (FTIR) and cyclic voltammetric studies. The surface functionalized moieties have been examined electrochemically by immobilizing them onto the surface of basal plane pyrolytic graphite electrode and studying its cyclic voltammetry. The effect of pH, scan rate (v), and the peak potentials (E p) as a function of pH has revealed that the species are surface bound in nature and covalently attached on the carbon surface. The FTIR studies of the derivatized carbon powder have revealed that the modifying molecule is covalently attached on the carbon particle surface.

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Acknowledgements

The authors acknowledge the financial support and award of the fellowship to TR by the Department of Science and Technology, New Delhi, India and also the financial support from UGC-DRS (Phase IV) program of the Department of Chemistry, Bangalore University.

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Authors and Affiliations

  1. Department of Studies in Chemistry, Bangalore University, Central College Campus, Dr Ambedkar Veedhi, Bangalore, 560 001, India

    Malingappa Pandurangappa & Thippeswamy Ramakrishnappa

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  1. Malingappa Pandurangappa
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  2. Thippeswamy Ramakrishnappa
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Correspondence to Malingappa Pandurangappa.

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Pandurangappa, M., Ramakrishnappa, T. Derivatization and characterization of functionalized carbon powder via diazonium salt reduction. J Solid State Electrochem 12, 1411–1419 (2008). https://doi.org/10.1007/s10008-007-0470-6

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  • DOI: https://doi.org/10.1007/s10008-007-0470-6

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