• Fulltext

       

        Click here to view fulltext PDF


      Permanent link:
      https://www.ias.ac.in/article/fulltext/pram/013/04/0393-0403

    • Keywords

       

      g-tensor; proton hyperfine coupling constant; INDO calculations; nitrogen hyperfine coupling constant

    • Abstract

       

      Room temperature EPR spectra of (NH4)2SO4 doped K2SO4 monocrystals irradiated with x-rays show the presence of NH3+ radicals. The EPR parameters areg ‖=2.0037 andg ⊥ = 2.0068;14NAXX=13.75;AYY=24.5;AZZ=25.5 gauss;1HAXX=AYY=22 andAZZ=25 gauss. From the14N and1H coupling constants it has been inferred that at room temperature the planar NH3+ radical undergoes rotation about theC3 axis which corroborates with the equivalence of the protons, but the radical itself is in an asymmetric crystal field environment. The 77K spectra indicate a considerable reduction in the motion of the radical with the free motion almost completely stopped.

    • Author Affiliations

       

      S Subramanian1 P Narayana Murty1 2 C R K Murty1 2

      1. Department of Chemistry, Indian Institute of Technology, Madras - 600 036
      2. Department of Physics, Nagarjuna University, Nagarjunanagar - 522 510
    • Dates

       
  • Pramana – Journal of Physics | News

    • Editorial Note on Continuous Article Publication

      Posted on July 25, 2019

      Click here for Editorial Note on CAP Mode

© 2021-2022 Indian Academy of Sciences, Bengaluru.