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Spin crossover-induced colossal positive and negative thermal expansion in a nanoporous coordination framework material
External control over the mechanical function of materials is paramount in the development of nanoscale machines. Yet, exploiting changes in atomic behaviour to produce controlled scalable motion is a formidable challenge. Here, we present an ultra-flexible coordination framework material in which a...
Autores principales: | , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group UK
2017
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5648752/ https://www.ncbi.nlm.nih.gov/pubmed/29051479 http://dx.doi.org/10.1038/s41467-017-00776-1 |
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author | Mullaney, Benjamin R. Goux-Capes, Laurence Price, David J. Chastanet, Guillaume Létard, Jean-François Kepert, Cameron J. |
author_facet | Mullaney, Benjamin R. Goux-Capes, Laurence Price, David J. Chastanet, Guillaume Létard, Jean-François Kepert, Cameron J. |
author_sort | Mullaney, Benjamin R. |
collection | PubMed |
description | External control over the mechanical function of materials is paramount in the development of nanoscale machines. Yet, exploiting changes in atomic behaviour to produce controlled scalable motion is a formidable challenge. Here, we present an ultra-flexible coordination framework material in which a cooperative electronic transition induces an extreme abrupt change in the crystal lattice conformation. This arises due to a change in the preferred coordination character of Fe(II) sites at different spin states, generating scissor-type flexing of the crystal lattice. Diluting the framework with transition-inactive Ni(II) sites disrupts long-range communication of spin state through the lattice, producing a more gradual transition and continuous lattice movement, thus generating colossal positive and negative linear thermal expansion behaviour, with coefficients of thermal expansion an order of magnitude greater than previously reported. This study has wider implications in the development of advanced responsive structures, demonstrating electronic control over mechanical motion. |
format | Online Article Text |
id | pubmed-5648752 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2017 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
spelling | pubmed-56487522017-10-23 Spin crossover-induced colossal positive and negative thermal expansion in a nanoporous coordination framework material Mullaney, Benjamin R. Goux-Capes, Laurence Price, David J. Chastanet, Guillaume Létard, Jean-François Kepert, Cameron J. Nat Commun Article External control over the mechanical function of materials is paramount in the development of nanoscale machines. Yet, exploiting changes in atomic behaviour to produce controlled scalable motion is a formidable challenge. Here, we present an ultra-flexible coordination framework material in which a cooperative electronic transition induces an extreme abrupt change in the crystal lattice conformation. This arises due to a change in the preferred coordination character of Fe(II) sites at different spin states, generating scissor-type flexing of the crystal lattice. Diluting the framework with transition-inactive Ni(II) sites disrupts long-range communication of spin state through the lattice, producing a more gradual transition and continuous lattice movement, thus generating colossal positive and negative linear thermal expansion behaviour, with coefficients of thermal expansion an order of magnitude greater than previously reported. This study has wider implications in the development of advanced responsive structures, demonstrating electronic control over mechanical motion. Nature Publishing Group UK 2017-10-20 /pmc/articles/PMC5648752/ /pubmed/29051479 http://dx.doi.org/10.1038/s41467-017-00776-1 Text en © The Author(s) 2017 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/. |
spellingShingle | Article Mullaney, Benjamin R. Goux-Capes, Laurence Price, David J. Chastanet, Guillaume Létard, Jean-François Kepert, Cameron J. Spin crossover-induced colossal positive and negative thermal expansion in a nanoporous coordination framework material |
title | Spin crossover-induced colossal positive and negative thermal expansion in a nanoporous coordination framework material |
title_full | Spin crossover-induced colossal positive and negative thermal expansion in a nanoporous coordination framework material |
title_fullStr | Spin crossover-induced colossal positive and negative thermal expansion in a nanoporous coordination framework material |
title_full_unstemmed | Spin crossover-induced colossal positive and negative thermal expansion in a nanoporous coordination framework material |
title_short | Spin crossover-induced colossal positive and negative thermal expansion in a nanoporous coordination framework material |
title_sort | spin crossover-induced colossal positive and negative thermal expansion in a nanoporous coordination framework material |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5648752/ https://www.ncbi.nlm.nih.gov/pubmed/29051479 http://dx.doi.org/10.1038/s41467-017-00776-1 |
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