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Solid-state magnetic resonance studies of polyaniline as a radical scavenger

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An Erratum to this article was published on 01 June 2005

Abstract

The first detailed study of polyaniline (PANI) and reduced PANI (R-PANI) before and after reaction with the stable organic free radical 1,1-diphenyl-2-picrylhydrazyl (DPPH) by using solidstate13C CP MAS (cross-polarization magic-angle spinning), NQS (nonquaternary suppressed) and CPPI (cross-polarization phase inversion) nuclear magnetic resonance techniques is reported. These techniques reveal relatively subtle structural changes that occur upon reaction with DPPH free radicals and confirm the radical scavenging ability of PANI. The integrated intensity of the PANI CP MAS spectrum after reaction with DPPH is about 8% larger than that of PANI and this cannot be explained by an oxidation process alone. The increase is attributed to a decrease in the polaron concentration in the polymer, which is consistent with electron paramagnetic resonance (EPR) data that show a decrease of the EPR signal intensity after reaction of chemically synthesized PANI with DPPH.

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Authors and Affiliations

  1. Polymer Electronics Research Centre, Department of Chemistry, University of Auckland, Private Bag 92019, Auckland, New Zealand

    Z. D. Zujovic, M. Gizdavic-Nikolaidis, P. A. Kilmartin, J. Travas-Sejdic, R. P. Cooney & G. A. Bowmaker

Authors
  1. Z. D. Zujovic
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  2. M. Gizdavic-Nikolaidis
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  3. P. A. Kilmartin
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  4. J. Travas-Sejdic
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  5. R. P. Cooney
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  6. G. A. Bowmaker
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Corresponding author

Correspondence to Z. D. Zujovic.

Additional information

An erratum to this article is available at http://dx.doi.org/10.1007/BF03167027.

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Zujovic, Z.D., Gizdavic-Nikolaidis, M., Kilmartin, P.A. et al. Solid-state magnetic resonance studies of polyaniline as a radical scavenger. Appl. Magn. Reson. 28, 123–136 (2005). https://doi.org/10.1007/BF03166999

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  • DOI: https://doi.org/10.1007/BF03166999

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