Stable and Unconventional Conformation of Single PEG Bent -CD-Based Polypseudorotaxanes

摘要

The unexpected formation of polypseudorotaxanes via attaching 2-bromoisobutyryl groups to both ends of poly(ethylene glycol) (PEG), which leads to the self-assembly with -cyclodextrins in aqueous solution, is reported in this study. The resulting polypseudorotaxanes exhibit stable and unconventional single PEG bent conformations as evident from XRD, FTIR, GPC, 13C CP/MAS, and 1H NMR analyses. These polypseudorotaxane products are so stable that they can initiate the bulk ATRP of butyl methacrylate to give rise to the same conformational polypseudorotaxanes.