Inducing enantioselective crystallization with and self‐assembly of star‐shaped hybrid polymers prepared via “grafting to” strategy

Helical polymers present some interesting and distinctive properties, and one of the most distinguished applications of them is the chiral recognition and resolution of enantiomers. In this work, star‐shaped hybrid helical poly (phenyl isocyanide) (PPI) with polyhedral oligomeric silsesquioxanes (PO...

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Bibliographic Details
Published in:Chirality (New York, N.Y.) N.Y.), 2022-01, Vol.34 (1), p.61-69
Main Authors: Zou, Hui, Liang, Wen‐Quan, Wu, Qi‐Liang, Zhou, Li, Hou, Xiao‐Hua, Liu, Na, Wu, Zong‐Quan
Format: Article
Language:English
Subjects:
Aqueous solutions
Chemical reactions
Conformation
Crystallization
Enantiomers
enantioselective crystallization
Ethylene glycol
Grafting
helical polymer
Micelles
poly (phenyl isocyanide)
Polyethylene glycol
Polyhedral oligomeric silsesquioxane
Polymers
POSS
self‐assembly
star polymer
Stereoisomerism
Water
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Summary:Helical polymers present some interesting and distinctive properties, and one of the most distinguished applications of them is the chiral recognition and resolution of enantiomers. In this work, star‐shaped hybrid helical poly (phenyl isocyanide) (PPI) with polyhedral oligomeric silsesquioxanes (POSS) as the core was designed and synthesized by “grafting to” strategy. The homoarm star‐shaped hybrid POSS‐(PPI)8 was first obtained by the click reaction between azide‐modified POSS (POSS‐(N3)8) and alkynyl‐modified PPI (PPI‐Alkynyl). The hybrid POSS‐(PPI)8 was with predominated left‐handed helical conformation and exhibited excellent ability in the enantioselective crystallization of racemic compounds. In the meantime, heteroarm star‐shaped hybrid (PEG)4‐POSS‐(PPI)4 was prepared by the click reaction of POSS‐(N3)8 with PPI‐Alkynyl and alkynyl‐modified poly (ethylene glycol) (PEG‐Alkynyl). The hybrid (PEG)4‐POSS‐(PPI)4 was amphiphilic, and it could self‐assemble to form spherical micelles in aqueous solutions. Well‐defined star‐shaped hybrid helical poly (phenyl isocyanide)s with POSS core were designed and synthesized by “grafting to” strategy. The enantioselective crystallization ability, as well as the self‐assembly behavior of the star‐shaped hybrid polymers, was investigated.
ISSN:0899-0042
1520-636X
DOI:10.1002/chir.23387