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Giant thermal expansion of a two-dimensional supramolecular network triggered by alkyl chain motion

Thermal expansion, the response in shape, area or volume of a solid with heat, is usually large in molecular materials compared to their inorganic counterparts. Resulting from the intrinsic molecule flexibility, conformational changes or variable intermolecular interactions, the exact interplay betw...

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Autores principales: Scherb, Sebastian, Hinaut, Antoine, Pawlak, Rémy, Vilhena, J. G., Liu, Yi, Freund, Sara, Liu, Zhao, Feng, Xinliang, Müllen, Klaus, Glatzel, Thilo, Narita, Akimitsu, Meyer, Ernst
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7099928/
https://www.ncbi.nlm.nih.gov/pubmed/32259137
http://dx.doi.org/10.1038/s43246-020-0009-2
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author Scherb, Sebastian
Hinaut, Antoine
Pawlak, Rémy
Vilhena, J. G.
Liu, Yi
Freund, Sara
Liu, Zhao
Feng, Xinliang
Müllen, Klaus
Glatzel, Thilo
Narita, Akimitsu
Meyer, Ernst
author_facet Scherb, Sebastian
Hinaut, Antoine
Pawlak, Rémy
Vilhena, J. G.
Liu, Yi
Freund, Sara
Liu, Zhao
Feng, Xinliang
Müllen, Klaus
Glatzel, Thilo
Narita, Akimitsu
Meyer, Ernst
author_sort Scherb, Sebastian
collection PubMed
description Thermal expansion, the response in shape, area or volume of a solid with heat, is usually large in molecular materials compared to their inorganic counterparts. Resulting from the intrinsic molecule flexibility, conformational changes or variable intermolecular interactions, the exact interplay between these mechanisms is however poorly understood down to the molecular level. Here, we investigate the structural variations of a two-dimensional supramolecular network on Au(111) consisting of shape persistent polyphenylene molecules equipped with peripheral dodecyl chains. By comparing high-resolution scanning probe microscopy and molecular dynamics simulations obtained at 5 and 300 K, we determine the thermal expansion coefficient of the assembly of 980 ± 110 × 10(−6) K(−1), twice larger than other molecular systems hitherto reported in the literature, and two orders of magnitude larger than conventional materials. This giant positive expansion originates from the increased mobility of the dodecyl chains with temperature that determine the intermolecular interactions and the network spacing.
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spelling pubmed-70999282020-03-30 Giant thermal expansion of a two-dimensional supramolecular network triggered by alkyl chain motion Scherb, Sebastian Hinaut, Antoine Pawlak, Rémy Vilhena, J. G. Liu, Yi Freund, Sara Liu, Zhao Feng, Xinliang Müllen, Klaus Glatzel, Thilo Narita, Akimitsu Meyer, Ernst Commun Mater Article Thermal expansion, the response in shape, area or volume of a solid with heat, is usually large in molecular materials compared to their inorganic counterparts. Resulting from the intrinsic molecule flexibility, conformational changes or variable intermolecular interactions, the exact interplay between these mechanisms is however poorly understood down to the molecular level. Here, we investigate the structural variations of a two-dimensional supramolecular network on Au(111) consisting of shape persistent polyphenylene molecules equipped with peripheral dodecyl chains. By comparing high-resolution scanning probe microscopy and molecular dynamics simulations obtained at 5 and 300 K, we determine the thermal expansion coefficient of the assembly of 980 ± 110 × 10(−6) K(−1), twice larger than other molecular systems hitherto reported in the literature, and two orders of magnitude larger than conventional materials. This giant positive expansion originates from the increased mobility of the dodecyl chains with temperature that determine the intermolecular interactions and the network spacing. Nature Publishing Group UK 2020-02-17 2020 /pmc/articles/PMC7099928/ /pubmed/32259137 http://dx.doi.org/10.1038/s43246-020-0009-2 Text en © The Author(s) 2020 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
Scherb, Sebastian
Hinaut, Antoine
Pawlak, Rémy
Vilhena, J. G.
Liu, Yi
Freund, Sara
Liu, Zhao
Feng, Xinliang
Müllen, Klaus
Glatzel, Thilo
Narita, Akimitsu
Meyer, Ernst
Giant thermal expansion of a two-dimensional supramolecular network triggered by alkyl chain motion
title Giant thermal expansion of a two-dimensional supramolecular network triggered by alkyl chain motion
title_full Giant thermal expansion of a two-dimensional supramolecular network triggered by alkyl chain motion
title_fullStr Giant thermal expansion of a two-dimensional supramolecular network triggered by alkyl chain motion
title_full_unstemmed Giant thermal expansion of a two-dimensional supramolecular network triggered by alkyl chain motion
title_short Giant thermal expansion of a two-dimensional supramolecular network triggered by alkyl chain motion
title_sort giant thermal expansion of a two-dimensional supramolecular network triggered by alkyl chain motion
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7099928/
https://www.ncbi.nlm.nih.gov/pubmed/32259137
http://dx.doi.org/10.1038/s43246-020-0009-2
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