• S Sankarapandi

      Articles written in Journal of Chemical Sciences

    • Thermodynamics of some long-chain biradicals studied by EPR spectroscopy

      S Sankarapandi J M Rifkind P T Manoharan

      More Details Abstract Fulltext PDF

      Four biradicals of differing chain lengths have been prepared by spin-labelling the sulphhydryl groups of dithiothreitol. Temperature-dependent EPR spectra of these biradicals indicate that the dynamics of biradicals is associated with both fast and slow exchanges of conformations. The three-conformational model incorporating cage configuration is found to be more appropriate. Certain thermodynamic parameters of conformationalchanges have been calculated from the experimental EPR parameters, obtained by the use of simulation procedures developed recently.

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