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      Permanent link:
      https://www.ias.ac.in/article/fulltext/boms/045/0229

    • Keywords

       

      High pressure; Raman spectroscopy; perchlorates; diglycine perchlorate; hydrogen bond; glycine.

    • Abstract

       

      We report high pressure studies on an organic perchlorate system diglycine perchlorate (DGPCl) up to 15 GPa. Single crystals of DGPCl were studied using high pressure Raman spectroscopy, which show discontinuous spectral changes at two pressures across ${\sim}$1.8 and ${\sim}$9 GPa. While the low pressure phase transition is primarily governed by the reorientational changes in organic groups and the corresponding hydrogen bonds, the high pressure transition involves substantial changes in Raman spectroscopic features of the perchlorate group. The splitting of the characteristic and the most intense Raman mode, i.e., perchlorate symmetric stretching mode, above 9 GPa suggests modifications in perchlorate group local structure. The structural changes are found to be reversible upon pressure release.

    • Author Affiliations

       

      HIMAL BHATT1 2 S R VISHWAKARMA1 ARKADEV ROY1 S THOMAS1 L PANICKER3 T SAKUNTALA1

      1. High Pressure and Synchrotron Radiation Physics Division, Bhabha Atomic Research Centre, Mumbai 400085, India
      2. Homi Bhabha National Institute, Mumbai 400094, India
      3. Radiation Biology and Health Safety Physics Division, Bhabha Atomic Research Centre, Mumbai 400085, India

    • Dates

       
      Published
      16 November 2022
      Manuscript received
      1 June 2022
      Accepted
      20 September 2022
      Final version published online
      16 November 2022

  • Bulletin of Materials Science | News

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    • Editorial Note on Continuous Article Publication

      Posted on July 25, 2019

      Click here for Editorial Note on CAP Mode

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