Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/150742
Title: Understanding structural variations in elastic organic crystals by in situ high-pressure Fourier transform infrared spectroscopy and nanoindentation study
Authors: Ganguly, Somnath
Chinnasamy, Ragaverthini
Parikh, Shyamal
Kiran, Mangalampalli S. R. N.
Ramamurty, Upadrasta
Bhatt, Himal
Deo, Mukul Narayan
Ghosh, Soumyajit
Ghalsasi, Pallavi
Keywords: Science::Chemistry
Issue Date: 2019
Source: 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
Journal: Crystal Growth and Design
Abstract: 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.
URI: https://hdl.handle.net/10356/150742
ISSN: 1528-7483
DOI: 10.1021/acs.cgd.8b01684
Rights: © 2019 American Chemical Society. All rights reserved.
Fulltext Permission: none
Fulltext Availability: No Fulltext
Appears in Collections:MAE Journal Articles

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