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Non-stackable molecules assemble into porous crystals displaying concerted cavity-changing motions

With small molecules, it is not easy to create large void spaces. Flat aromatics stack tightly, while flexible chains fold to fill the cavities. As an intuitive design to make open channels inside molecularly constructed solids, we employed propeller-shaped bicyclic triazoles to prepare a series of...

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Autores principales: Kang, Taewon, Kim, Hongsik, Jeoung, Sungeun, Moon, Dohyun, Moon, Hoi Ri, Lee, Dongwhan
Formato: Online Artículo Texto
Lenguaje:English
Publicado: The Royal Society of Chemistry 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8115244/
https://www.ncbi.nlm.nih.gov/pubmed/34084437
http://dx.doi.org/10.1039/d1sc01163d
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author Kang, Taewon
Kim, Hongsik
Jeoung, Sungeun
Moon, Dohyun
Moon, Hoi Ri
Lee, Dongwhan
author_facet Kang, Taewon
Kim, Hongsik
Jeoung, Sungeun
Moon, Dohyun
Moon, Hoi Ri
Lee, Dongwhan
author_sort Kang, Taewon
collection PubMed
description With small molecules, it is not easy to create large void spaces. Flat aromatics stack tightly, while flexible chains fold to fill the cavities. As an intuitive design to make open channels inside molecularly constructed solids, we employed propeller-shaped bicyclic triazoles to prepare a series of aromatic-rich three-dimensional (3D) building blocks. This modular approach has no previous example, but is readily applicable to build linear, bent, and branched arrays of non-stackable architectural motifs from existing flat aromatics by single-pot reactions. A letter H-shaped molecule thus prepared self-assembles into porous crystals, the highly unusual stepwise gas sorption behaviour of which prompted in-depth studies. A combination of single-crystal and powder X-ray diffraction analysis revealed multiple polymorphs, and sterically allowed pathways for their reversible interconversions that open and close the pores in response to external stimuli.
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spelling pubmed-81152442021-06-02 Non-stackable molecules assemble into porous crystals displaying concerted cavity-changing motions Kang, Taewon Kim, Hongsik Jeoung, Sungeun Moon, Dohyun Moon, Hoi Ri Lee, Dongwhan Chem Sci Chemistry With small molecules, it is not easy to create large void spaces. Flat aromatics stack tightly, while flexible chains fold to fill the cavities. As an intuitive design to make open channels inside molecularly constructed solids, we employed propeller-shaped bicyclic triazoles to prepare a series of aromatic-rich three-dimensional (3D) building blocks. This modular approach has no previous example, but is readily applicable to build linear, bent, and branched arrays of non-stackable architectural motifs from existing flat aromatics by single-pot reactions. A letter H-shaped molecule thus prepared self-assembles into porous crystals, the highly unusual stepwise gas sorption behaviour of which prompted in-depth studies. A combination of single-crystal and powder X-ray diffraction analysis revealed multiple polymorphs, and sterically allowed pathways for their reversible interconversions that open and close the pores in response to external stimuli. The Royal Society of Chemistry 2021-04-01 /pmc/articles/PMC8115244/ /pubmed/34084437 http://dx.doi.org/10.1039/d1sc01163d Text en This journal is © The Royal Society of Chemistry https://creativecommons.org/licenses/by-nc/3.0/
spellingShingle Chemistry
Kang, Taewon
Kim, Hongsik
Jeoung, Sungeun
Moon, Dohyun
Moon, Hoi Ri
Lee, Dongwhan
Non-stackable molecules assemble into porous crystals displaying concerted cavity-changing motions
title Non-stackable molecules assemble into porous crystals displaying concerted cavity-changing motions
title_full Non-stackable molecules assemble into porous crystals displaying concerted cavity-changing motions
title_fullStr Non-stackable molecules assemble into porous crystals displaying concerted cavity-changing motions
title_full_unstemmed Non-stackable molecules assemble into porous crystals displaying concerted cavity-changing motions
title_short Non-stackable molecules assemble into porous crystals displaying concerted cavity-changing motions
title_sort non-stackable molecules assemble into porous crystals displaying concerted cavity-changing motions
topic Chemistry
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8115244/
https://www.ncbi.nlm.nih.gov/pubmed/34084437
http://dx.doi.org/10.1039/d1sc01163d
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