Understanding structural variations in elastic organic crystals by in situ high-pressure Fourier transform infrared spectroscopy and nanoindentation study
Organic crystals possessing elasticity are gaining wide attention due to their potential applications in technology. From a design perspective, it is of utmost importance to understand the mechanical behavior of these crystals and their ability to handle stress. In this paper, we present an in situ...
| Main Authors: | , , , , , , , , |
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| Format: | Journal Article |
| Language: | English |
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2021
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| Online Access: | https://hdl.handle.net/10356/150742 |
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| author | Ganguly, Somnath Chinnasamy, Ragaverthini Parikh, Shyamal Kiran, Mangalampalli S. R. N. Ramamurty, Upadrasta Bhatt, Himal Deo, Mukul Narayan Ghosh, Soumyajit Ghalsasi, Pallavi |
| author2 | School of Mechanical and Aerospace Engineering |
| author_facet | School of Mechanical and Aerospace Engineering Ganguly, Somnath Chinnasamy, Ragaverthini Parikh, Shyamal Kiran, Mangalampalli S. R. N. Ramamurty, Upadrasta Bhatt, Himal Deo, Mukul Narayan Ghosh, Soumyajit Ghalsasi, Pallavi |
| author_sort | Ganguly, Somnath |
| collection | NTU |
| description | Organic crystals possessing elasticity are gaining wide attention due to their potential applications in technology. From a design perspective, it is of utmost importance to understand the mechanical behavior of these crystals and their ability to handle stress. In this paper, we present an in situ high-pressure Fourier transform infrared spectroscopy study on 2,5-dichloro-N-benzylidene-4-chloroaniline (DPA) and 2,6 dichloro-N-benzylidene-4-fluoro-3-nitro aniline (DFA) crystals at pressures ranging from ambient pressure to 21.5 and 14.5 GPa respectively along with nanoindentation studies, at room temperature. The infrared stretching wavenumber of the aromatic and aliphatic C-H, H-C=N, and C-Cl bands on compression showed blueshifts and increased widths, which reflect structure perturbation caused by changes in intermolecular interactions in the crystals. It was noted that both crystals DPA and DFA behave in a different fashion under high-pressure prompting the derivation of different models based on structural changes in the lattice. Further, nanoindentation studies corroborated pressure-induced molecular movement in both crystals. |
| first_indexed | 2025-02-19T03:32:06Z |
| format | Journal Article |
| id | ntu-10356/150742 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2025-02-19T03:32:06Z |
| publishDate | 2021 |
| record_format | dspace |
| spelling | ntu-10356/1507422021-08-02T03:37:20Z Understanding structural variations in elastic organic crystals by in situ high-pressure Fourier transform infrared spectroscopy and nanoindentation study Ganguly, Somnath Chinnasamy, Ragaverthini Parikh, Shyamal Kiran, Mangalampalli S. R. N. Ramamurty, Upadrasta Bhatt, Himal Deo, Mukul Narayan Ghosh, Soumyajit Ghalsasi, Pallavi School of Mechanical and Aerospace Engineering Science::Chemistry Nanoindentation Crystals Organic crystals possessing elasticity are gaining wide attention due to their potential applications in technology. From a design perspective, it is of utmost importance to understand the mechanical behavior of these crystals and their ability to handle stress. In this paper, we present an in situ high-pressure Fourier transform infrared spectroscopy study on 2,5-dichloro-N-benzylidene-4-chloroaniline (DPA) and 2,6 dichloro-N-benzylidene-4-fluoro-3-nitro aniline (DFA) crystals at pressures ranging from ambient pressure to 21.5 and 14.5 GPa respectively along with nanoindentation studies, at room temperature. The infrared stretching wavenumber of the aromatic and aliphatic C-H, H-C=N, and C-Cl bands on compression showed blueshifts and increased widths, which reflect structure perturbation caused by changes in intermolecular interactions in the crystals. It was noted that both crystals DPA and DFA behave in a different fashion under high-pressure prompting the derivation of different models based on structural changes in the lattice. Further, nanoindentation studies corroborated pressure-induced molecular movement in both crystals. S.G. thanks the Science and Engineering Research Board, Department of Science and Technology, Government of India, for the Early Career Research Award Grant (No. ECR/2017/000060). M.S.R.N.K. thanks the Science and Engineering Research Board, Department of Science and Technology, Government of India, for an Early Career Research Award (File No. ECR/2016/000827). R.C. thanks SRM Institute of Science and Technology for a Ph.D. fellowship. P.G. would like to acknowledge financial support from DAE-BRNS (2012/37P/15/BRNS/806) and DST-SERB (EMR/2016/003974). We thank Prof. Gautam R. Desiraju from the Indian Institute of Science, Bangalore, for his constant inspiration. 2021-08-02T03:37:20Z 2021-08-02T03:37:20Z 2019 Journal Article Ganguly, S., Chinnasamy, R., Parikh, S., Kiran, M. S. R. N., Ramamurty, U., Bhatt, H., Deo, M. N., Ghosh, S. & Ghalsasi, P. (2019). Understanding structural variations in elastic organic crystals by in situ high-pressure Fourier transform infrared spectroscopy and nanoindentation study. Crystal Growth and Design, 19(4), 2114-2122. https://dx.doi.org/10.1021/acs.cgd.8b01684 1528-7483 0000-0002-8686-3055 0000-0002-2287-5532 0000-0002-4589-5608 https://hdl.handle.net/10356/150742 10.1021/acs.cgd.8b01684 2-s2.0-85062846067 4 19 2114 2122 en Crystal Growth and Design © 2019 American Chemical Society. All rights reserved. |
| spellingShingle | Science::Chemistry Nanoindentation Crystals Ganguly, Somnath Chinnasamy, Ragaverthini Parikh, Shyamal Kiran, Mangalampalli S. R. N. Ramamurty, Upadrasta Bhatt, Himal Deo, Mukul Narayan Ghosh, Soumyajit Ghalsasi, Pallavi Understanding structural variations in elastic organic crystals by in situ high-pressure Fourier transform infrared spectroscopy and nanoindentation study |
| title | Understanding structural variations in elastic organic crystals by in situ high-pressure Fourier transform infrared spectroscopy and nanoindentation study |
| title_full | Understanding structural variations in elastic organic crystals by in situ high-pressure Fourier transform infrared spectroscopy and nanoindentation study |
| title_fullStr | Understanding structural variations in elastic organic crystals by in situ high-pressure Fourier transform infrared spectroscopy and nanoindentation study |
| title_full_unstemmed | Understanding structural variations in elastic organic crystals by in situ high-pressure Fourier transform infrared spectroscopy and nanoindentation study |
| title_short | Understanding structural variations in elastic organic crystals by in situ high-pressure Fourier transform infrared spectroscopy and nanoindentation study |
| title_sort | understanding structural variations in elastic organic crystals by in situ high pressure fourier transform infrared spectroscopy and nanoindentation study |
| topic | Science::Chemistry Nanoindentation Crystals |
| url | https://hdl.handle.net/10356/150742 |
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