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Preparation and temperature-controlled morphology of helical microrods composed of supramolecular α-cyclodextrin assemblies.

Toshiyuki KidaAyumi TeragakiHaruya IshidaSayaka SonodaMomoka MiyasakaHajime Shigemitsu
Published in: RSC advances (2023)
Significant efforts have been devoted so far to artificially fabricate supramolecular helical nano- and microstructures through the regulated assembly of biological and synthetic building blocks. However, the preparation of supramolecular helical structures with a regulated morphology remains challenging. Here, helical microrods composed of supramolecular α-cyclodextrin (α-CD) assemblies were fabricated by allowing an α-CD/1,1,1,3,3,3-hexafluoro-2-propanol (HFIP)/2-pentanol mixture to stand at 30-60 °C under high humidity conditions. The morphology could be controlled by temperature to produce helical microrods with a regulated pitch and length. These helical rods can be applied as optical devices, chiral separation devices and asymmetric catalysts.
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