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Supramolecular Tubule from Seesaw Shaped Amphiphile and Its Hierarchical Evolution into Sheet
Author(s) -
Sun Haonan,
Dong Longlong,
Kim Yongju,
Lee Myongsoo
Publication year - 2020
Publication title -
chemistry – an asian journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.18
H-Index - 106
eISSN - 1861-471X
pISSN - 1861-4728
DOI - 10.1002/asia.202000654
Subject(s) - azobenzene , supramolecular chemistry , photoisomerization , isomerization , amphiphile , materials science , crystallography , chemistry , nanotechnology , copolymer , crystal structure , catalysis , composite material , biochemistry , polymer
Although supramolecular one‐dimensional (1D) and two‐dimensional (2D) structures with various unique properties have been extensively studied, the reversible switching between tubules and sheets via lateral association remains challenging. Here, we report the unique structures of a supramolecular tubular bamboo culm in which the hollow‐tubular interior is separated, at intervals, by nodes per 1.3 nm. Interestingly, the discrete tubules are able to hierarchically assemble into a flat sheet in response to an aromatic guest. The addition of trans ‐azobenzene, as a guest, enables the tubules to form a hierarchical sheet assembly via the lateral interaction. The hierarchical sheet structures are disassembled into their constituent tubules upon UV irradiation due to trans ‐ cis isomerization. The recovery from cis ‐azobenzene to trans ‐form induces repeatedly the hierarchical sheet assembly, indicative of a reversible switching behavior between tubules and sheets triggered by an external stimulus.