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- W2897073207 abstract "A “biowheel-axle” assembly of polyrotaxanes of β-cyclodextrin (β-CD) threaded onto bile acid moieties linked by a poly(ethylene glycol) (PEG) spacer of tunable length was prepared through an “inclusion polymerization” approach. The bile acid-diamine derivatives were allowed to first form inclusion complexes with β-CD and then polymerized with PEG-dicarbonate, followed by end-capping with a stopper of monoamino-β-CD, resulting in “biowheels” of β-CD with PEGylated bile acids as the axle in tandem. All steps were performed without the use of catalysts. The complexation between β-CD and bile acid units of the polymer chain was confirmed by the 2D NOESY NMR technique and powder X-ray diffraction, showing 85% of bile acid units entered the cavity of β-CD. The change of PEG spacer length from 45 to 6 ethylene glycol units led to a flexible–rigid conformation transition of the polyrotaxanes, supported by the random and straight orientation of the “biowheels” shown by scanning tunneling microscopy images. The control of the conformation helps to tune the property of the polyrotaxanes. The “biowheel-axle” assembly constructed from such a natural host–guest pair may also lead to the further exploration of bio-related applications." @default.
- W2897073207 created "2018-10-26" @default.
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- W2897073207 date "2018-10-17" @default.
- W2897073207 modified "2023-09-30" @default.
- W2897073207 title "“Biowheel-Axle” Assembly of β-Cyclodextrin Fitted onto Bile Acid Units Linked by PEG Spacers through Inclusion Polymerization" @default.
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- W2897073207 doi "https://doi.org/10.1021/acs.macromol.8b01702" @default.
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