Aromatic foldamers as molecular springs in network polymers

Polymer networks crosslinked with spring-like ortho -phenylene ( o P) foldamers were developed. NMR analysis indicated the o P crosslinkers were well-folded. Polymer networks with o P-based crosslinkers showed enhanced energy dissipation and elasticity compared to divinylbenzene crosslinked networks...

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Bibliographic Details
Published in:Chemical communications (Cambridge, England) England), 2022-05, Vol.58 (37), p.559-5593
Main Authors: Miller, K. Andrew, Dodo, Obed J, Devkota, Govinda Prasad, Kirinda, Viraj C, Bradford, Kate G. E, Sparks, Jessica L, Hartley, C. Scott, Konkolewicz, Dominik
Format: Article
Language:English
Subjects:
Crosslinking
Divinylbenzene
Energy dissipation
Magnetic Resonance Spectroscopy
Networks
NMR
Nuclear magnetic resonance
Polymers
Polymers - chemistry
Springs (elastic)
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Summary:Polymer networks crosslinked with spring-like ortho -phenylene ( o P) foldamers were developed. NMR analysis indicated the o P crosslinkers were well-folded. Polymer networks with o P-based crosslinkers showed enhanced energy dissipation and elasticity compared to divinylbenzene crosslinked networks. The energy dissipation was attributed to the strain-induced reversible unfolding of the o P units. Energy dissipation increased with the number of helical turns in the foldamer. Aromatic foldamer based networks are developed, where the foldamer unit acts as a molecular spring. Energy dissipation increases with the number of turns in the foldamer, consistent with mechanical unfolding of the molecular spring.
ISSN:1359-7345
1364-548X
DOI:10.1039/d2cc01223e