Angewandte Chemie - International Edition
Angewandte Chemie - International Edition
5 years ago

Toroid Formation through a Supramolecular “Cyclization Reaction” of Rodlike Micelles

Toroid Formation through a Supramolecular “Cyclization Reaction” of Rodlike Micelles
Yuhan Wei, Zhibo Li, Jiaping Lin, Chunhua Cai, Chaoying Yang, Liquan Wang, Liang Gao
Constructing polymeric toroids with a uniform, tunable size is challenging. Reported herein is the formation of uniform toroids from poly(γ-benzyl-l-glutamate)-graft-poly(ethylene glycol) (PBLG-g-PEG) graft copolymers by a two-step self-assembly process. In the first step, uniform rodlike micelles are prepared by dialyzing the polymer dissolved in tetrahydrofuran (THF)/N,N′-dimethylformamide (DMF) against water. With the addition of THF in the second step, the rodlike micelles curve and then close end-to-end to form uniform toroids, which resemble a cyclization reaction. Rodlike micelles, self-assembled from polypeptide graft copolymers with rigid backbones, can exclusively close end-to-end to form toroids under solvent and temperature stimuli. This transformation resembles a cyclization reaction.

Publisher URL: http://onlinelibrary.wiley.com/resolve/doi

DOI: 10.1002/anie.201701978

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