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T SAKUNTALA
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Volume 45 All articles Published: 27 September 2022 Article ID 0192
Benzoic acid derivatives under pressure: a Raman spectroscopic overview
Benzoic acid derivatives display diverse physical properties depending upon the nature and position of the functional groups. The presence of non-bonded interactions that come into play because of various functional groups in these materials is discussed with the help of density functional theory calculations and Raman spectroscopic studies at ambient conditions and slightly elevated pressures.
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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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Bulletin of Materials Science | News
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Dr Shanti Swarup Bhatnagar for Science and Technology
Posted on October 12, 2020Prof. Subi Jacob George — Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur, Bengaluru
Chemical Sciences 2020Prof. Surajit Dhara — School of Physics, University of Hyderabad, Hyderabad
Physical Sciences 2020 -
Editorial Note on Continuous Article Publication
Posted on July 25, 2019Click here for Editorial Note on CAP Mode
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