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Pyrene-Based Co-Assembled Supramolecular Gel; Morphology Changes and Macroscale Mechanical Property

Two pyrene derivatives having the perylenediimide (1) or the alky chain (2) in the middle of molecules were synthesized. Co-assembled supramolecular gels were prepared at different molar ratios of 0.2, 0.5, and 0.8 equiv. of 2 to 1. By SEM observation, the morphology of co-assembled supramolecular g...

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Autores principales: Kim, Ka Young, Ok, Mirae, Kim, Jaehyeong, Jung, Sung Ho, Seo, Moo Lyong, Jung, Jong Hwa
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7345282/
https://www.ncbi.nlm.nih.gov/pubmed/32429228
http://dx.doi.org/10.3390/gels6020016
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author Kim, Ka Young
Ok, Mirae
Kim, Jaehyeong
Jung, Sung Ho
Seo, Moo Lyong
Jung, Jong Hwa
author_facet Kim, Ka Young
Ok, Mirae
Kim, Jaehyeong
Jung, Sung Ho
Seo, Moo Lyong
Jung, Jong Hwa
author_sort Kim, Ka Young
collection PubMed
description Two pyrene derivatives having the perylenediimide (1) or the alky chain (2) in the middle of molecules were synthesized. Co-assembled supramolecular gels were prepared at different molar ratios of 0.2, 0.5, and 0.8 equiv. of 2 to 1. By SEM observation, the morphology of co-assembled supramolecular gels changed from spherical nanoparticles to three-dimensional network nanofibers as the ratio of 2 increased. In addition, the pyrene-excimer emission of co-assembled gels increased with increasing concentration of 2, and was stronger when compared with the condition without 1 or 2, indicating the formation of pyrene interaction between 1 and 2. In addition, the sol-gel transition was found to be reversible over repeated measurement by tube inversion method. The rheological properties of co-assembled supramolecular gels were also improved by increasing the ratio of 2, due to the increased nanoscale flexibility of supramolecular packing by introducing alkyl chain groups through heterogeneous pyrene interaction. These findings suggest that macroscale mechanical strength of co-assembled supramolecular gel was strongly influenced by nanoscale flexibility of the supramolecular packing.
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spelling pubmed-73452822020-07-09 Pyrene-Based Co-Assembled Supramolecular Gel; Morphology Changes and Macroscale Mechanical Property Kim, Ka Young Ok, Mirae Kim, Jaehyeong Jung, Sung Ho Seo, Moo Lyong Jung, Jong Hwa Gels Communication Two pyrene derivatives having the perylenediimide (1) or the alky chain (2) in the middle of molecules were synthesized. Co-assembled supramolecular gels were prepared at different molar ratios of 0.2, 0.5, and 0.8 equiv. of 2 to 1. By SEM observation, the morphology of co-assembled supramolecular gels changed from spherical nanoparticles to three-dimensional network nanofibers as the ratio of 2 increased. In addition, the pyrene-excimer emission of co-assembled gels increased with increasing concentration of 2, and was stronger when compared with the condition without 1 or 2, indicating the formation of pyrene interaction between 1 and 2. In addition, the sol-gel transition was found to be reversible over repeated measurement by tube inversion method. The rheological properties of co-assembled supramolecular gels were also improved by increasing the ratio of 2, due to the increased nanoscale flexibility of supramolecular packing by introducing alkyl chain groups through heterogeneous pyrene interaction. These findings suggest that macroscale mechanical strength of co-assembled supramolecular gel was strongly influenced by nanoscale flexibility of the supramolecular packing. MDPI 2020-05-15 /pmc/articles/PMC7345282/ /pubmed/32429228 http://dx.doi.org/10.3390/gels6020016 Text en © 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Communication
Kim, Ka Young
Ok, Mirae
Kim, Jaehyeong
Jung, Sung Ho
Seo, Moo Lyong
Jung, Jong Hwa
Pyrene-Based Co-Assembled Supramolecular Gel; Morphology Changes and Macroscale Mechanical Property
title Pyrene-Based Co-Assembled Supramolecular Gel; Morphology Changes and Macroscale Mechanical Property
title_full Pyrene-Based Co-Assembled Supramolecular Gel; Morphology Changes and Macroscale Mechanical Property
title_fullStr Pyrene-Based Co-Assembled Supramolecular Gel; Morphology Changes and Macroscale Mechanical Property
title_full_unstemmed Pyrene-Based Co-Assembled Supramolecular Gel; Morphology Changes and Macroscale Mechanical Property
title_short Pyrene-Based Co-Assembled Supramolecular Gel; Morphology Changes and Macroscale Mechanical Property
title_sort pyrene-based co-assembled supramolecular gel; morphology changes and macroscale mechanical property
topic Communication
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7345282/
https://www.ncbi.nlm.nih.gov/pubmed/32429228
http://dx.doi.org/10.3390/gels6020016
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