Cargando…
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...
Autores principales: | , , , , , |
---|---|
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 |
_version_ | 1783556144816455680 |
---|---|
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. |
format | Online Article Text |
id | pubmed-7345282 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2020 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
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 |
work_keys_str_mv | AT kimkayoung pyrenebasedcoassembledsupramoleculargelmorphologychangesandmacroscalemechanicalproperty AT okmirae pyrenebasedcoassembledsupramoleculargelmorphologychangesandmacroscalemechanicalproperty AT kimjaehyeong pyrenebasedcoassembledsupramoleculargelmorphologychangesandmacroscalemechanicalproperty AT jungsungho pyrenebasedcoassembledsupramoleculargelmorphologychangesandmacroscalemechanicalproperty AT seomoolyong pyrenebasedcoassembledsupramoleculargelmorphologychangesandmacroscalemechanicalproperty AT jungjonghwa pyrenebasedcoassembledsupramoleculargelmorphologychangesandmacroscalemechanicalproperty |