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Volume 45 All articles Published: 16 November 2022 Article ID 0229
High pressure phase transitions in diglycine perchlorate: a Raman spectroscopic study
HIMAL BHATT S R VISHWAKARMA ARKADEV ROY S THOMAS L PANICKER T SAKUNTALA
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.
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Bulletin of Materials Science
Volume 46, 2023
All articles
Continuous Article Publishing mode
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Dr Shanti Swarup Bhatnagar for Science and Technology
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