• Heisenberg spin exchange and chemical electron exchange in napthalene negative ion—An electron spin-lattice relaxation study

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      https://www.ias.ac.in/article/fulltext/jcsc/095/01-02/0117-0128

    • Keywords

       

      Electron spin-lattice relaxation; ESR ; chemical exchange; Heisenberg exchange; aromatic anions; napthalene negative ion; saturation recovery technique

    • Abstract

       

      Electron spin-lattice relaxation times (T1e) as determined by saturation recovery technique and linewidths have been investigated as a function of the concentration of napthalene anion and the unreduced napthalene in dimethoxyethane from conditions of slow exchange to fast exchange. It was observed that Heisenberg spin exchange was more effective in determiningT1e and linewidth than chemical exchange at comparable concentrations. Contrary to earlier findings,T1e was found to depend on the radical concentration even at the fast exchange regime.

    • Author Affiliations

       

      Ranjan Das1 Balu Venkataraman1

      1. Tata Institute of Fundamental Research, Homi Bhabha Road, Bombay - 400005, India
    • Dates

       
  • Journal of Chemical Sciences | News

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