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- Title
Supramolecular double-stranded Archimedean spirals and concentric toroids.
- Authors
Sasaki, Norihiko; Mabesoone, Mathijs F. J.; Kikkawa, Jun; Fukui, Tomoya; Shioya, Nobutaka; Shimoaka, Takafumi; Hasegawa, Takeshi; Takagi, Hideaki; Haruki, Rie; Shimizu, Nobutaka; Adachi, Shin-ichi; Meijer, E. W.; Takeuchi, Masayuki; Sugiyasu, Kazunori
- Abstract
Connecting molecular-level phenomena to larger scales and, ultimately, to sophisticated molecular systems that resemble living systems remains a considerable challenge in supramolecular chemistry. To this end, molecular self-assembly at higher hierarchical levels has to be understood and controlled. Here, we report unusual self-assembled structures formed from a simple porphyrin derivative. Unexpectedly, this formed a one-dimensional (1D) supramolecular polymer that coiled to give an Archimedean spiral. Our analysis of the supramolecular polymerization by using mass-balance models suggested that the Archimedean spiral is formed at high concentrations of the monomer, whereas other aggregation types might form at low concentrations. Gratifyingly, we discovered that our porphyrin-based monomer formed supramolecular concentric toroids at low concentrations. Moreover, a mechanistic insight into the self-assembly process permitted a controlled synthesis of these concentric toroids. This study both illustrates the richness of self-assembled structures at higher levels of hierarchy and demonstrates a topological effect in noncovalent synthesis. Connecting molecular-level phenomena to larger scales and molecular systems that resemble living systems remains a considerable challenge in supramolecular chemistry. Here, the authors report different self-assembly patterns in a porphyrin structure which can form – depending on the concentration - spirals or toroids.
- Subjects
SUPRAMOLECULAR chemistry; SUPRAMOLECULAR polymers; MOLECULAR self-assembly; LARGE scale systems; PORPHYRINS
- Publication
Nature Communications, 2020, Vol 11, Issue 1, p1
- ISSN
2041-1723
- Publication type
Article
- DOI
10.1038/s41467-020-17356-5