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RETRACTED ARTICLE: Mechanically interlocked architecture aids an ultra-stiff and ultra-hard elastically bendable cocrystal
Molecular crystals are not known to be as stiff as metals, composites and ceramics. Here we report an exceptional mechanical stiffness and high hardness in a known elastically bendable organic cocrystal [caffeine (CAF), 4-chloro-3-nitrobenzoic acid (CNB) and methanol (1:1:1)] which is comparable to...
Autores principales: | , , , , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group UK
2019
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6697680/ https://www.ncbi.nlm.nih.gov/pubmed/31420538 http://dx.doi.org/10.1038/s41467-019-11657-0 |
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author | Dey, Somnath Das, Susobhan Bhunia, Surojit Chowdhury, Rituparno Mondal, Amit Bhattacharya, Biswajit Devarapalli, Ramesh Yasuda, Nobuhiro Moriwaki, Taro Mandal, Kapil Mukherjee, Goutam Dev Reddy, C. Malla |
author_facet | Dey, Somnath Das, Susobhan Bhunia, Surojit Chowdhury, Rituparno Mondal, Amit Bhattacharya, Biswajit Devarapalli, Ramesh Yasuda, Nobuhiro Moriwaki, Taro Mandal, Kapil Mukherjee, Goutam Dev Reddy, C. Malla |
author_sort | Dey, Somnath |
collection | PubMed |
description | Molecular crystals are not known to be as stiff as metals, composites and ceramics. Here we report an exceptional mechanical stiffness and high hardness in a known elastically bendable organic cocrystal [caffeine (CAF), 4-chloro-3-nitrobenzoic acid (CNB) and methanol (1:1:1)] which is comparable to certain low-density metals. Spatially resolved atomic level studies reveal that the mechanically interlocked weak hydrogen bond networks which are separated by dispersive interactions give rise to these mechanical properties. Upon bending, the crystals significantly conserve the overall energy by efficient redistribution of stress while perturbations in hydrogen bonds are compensated by strengthened π-stacking. Furthermore we report a remarkable stiffening and hardening in the elastically bent crystal. Hence, mechanically interlocked architectures provide an unexplored route to reach new mechanical limits and adaptability in organic crystals. This proof of concept inspires the design of light-weight, stiff crystalline organics with potential to rival certain inorganics, which currently seem inconceivable. |
format | Online Article Text |
id | pubmed-6697680 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2019 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
spelling | pubmed-66976802019-08-19 RETRACTED ARTICLE: Mechanically interlocked architecture aids an ultra-stiff and ultra-hard elastically bendable cocrystal Dey, Somnath Das, Susobhan Bhunia, Surojit Chowdhury, Rituparno Mondal, Amit Bhattacharya, Biswajit Devarapalli, Ramesh Yasuda, Nobuhiro Moriwaki, Taro Mandal, Kapil Mukherjee, Goutam Dev Reddy, C. Malla Nat Commun Article Molecular crystals are not known to be as stiff as metals, composites and ceramics. Here we report an exceptional mechanical stiffness and high hardness in a known elastically bendable organic cocrystal [caffeine (CAF), 4-chloro-3-nitrobenzoic acid (CNB) and methanol (1:1:1)] which is comparable to certain low-density metals. Spatially resolved atomic level studies reveal that the mechanically interlocked weak hydrogen bond networks which are separated by dispersive interactions give rise to these mechanical properties. Upon bending, the crystals significantly conserve the overall energy by efficient redistribution of stress while perturbations in hydrogen bonds are compensated by strengthened π-stacking. Furthermore we report a remarkable stiffening and hardening in the elastically bent crystal. Hence, mechanically interlocked architectures provide an unexplored route to reach new mechanical limits and adaptability in organic crystals. This proof of concept inspires the design of light-weight, stiff crystalline organics with potential to rival certain inorganics, which currently seem inconceivable. Nature Publishing Group UK 2019-08-16 /pmc/articles/PMC6697680/ /pubmed/31420538 http://dx.doi.org/10.1038/s41467-019-11657-0 Text en © The Author(s) 2019 https://creativecommons.org/licenses/by/4.0/Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) . |
spellingShingle | Article Dey, Somnath Das, Susobhan Bhunia, Surojit Chowdhury, Rituparno Mondal, Amit Bhattacharya, Biswajit Devarapalli, Ramesh Yasuda, Nobuhiro Moriwaki, Taro Mandal, Kapil Mukherjee, Goutam Dev Reddy, C. Malla RETRACTED ARTICLE: Mechanically interlocked architecture aids an ultra-stiff and ultra-hard elastically bendable cocrystal |
title | RETRACTED ARTICLE: Mechanically interlocked architecture aids an ultra-stiff and ultra-hard elastically bendable cocrystal |
title_full | RETRACTED ARTICLE: Mechanically interlocked architecture aids an ultra-stiff and ultra-hard elastically bendable cocrystal |
title_fullStr | RETRACTED ARTICLE: Mechanically interlocked architecture aids an ultra-stiff and ultra-hard elastically bendable cocrystal |
title_full_unstemmed | RETRACTED ARTICLE: Mechanically interlocked architecture aids an ultra-stiff and ultra-hard elastically bendable cocrystal |
title_short | RETRACTED ARTICLE: Mechanically interlocked architecture aids an ultra-stiff and ultra-hard elastically bendable cocrystal |
title_sort | retracted article: mechanically interlocked architecture aids an ultra-stiff and ultra-hard elastically bendable cocrystal |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6697680/ https://www.ncbi.nlm.nih.gov/pubmed/31420538 http://dx.doi.org/10.1038/s41467-019-11657-0 |
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