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Sequence-modification in copoly(ester-imide)s: a catalytic/supramolecular approach to the evolution and reading of copolymer sequence-information

Knappert, M. and Colquhoun, H. M. (2021) Sequence-modification in copoly(ester-imide)s: a catalytic/supramolecular approach to the evolution and reading of copolymer sequence-information. Polymer Journal. ISSN 1349-0540

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To link to this item DOI: 10.1038/s41428-021-00465-3

Abstract/Summary

Catalytic ester-interchange reactions, analogous to mutation and recombination, allow new sequence-information to be written, statistically, into NDI-based poly(ester-imide) chains. Thus, both insertion of the cyclic ester cyclopentadecanolide ("exaltolide") into an NDI-based homopolymer, and quantitative sequence-exchange between two different homopoly(ester-imide)s, are catalysed by di-n-butyl tin(IV) oxide. Emerging sequences are identified at the triplet and quintet levels using supramolecular complexation of pyrene-d10 at the NDI residues to amplify the separation of 1H NMR resonances associated with different sequences. In such systems, pyrene is able to act as a "reader-molecule" by generating different levels of ring-current shielding from the different patterns of supramolecular binding to all the NDI-centred sequences of a given length.

Item Type:Article
Refereed:Yes
Divisions:Interdisciplinary centres and themes > Chemical Analysis Facility (CAF)
Life Sciences > School of Chemistry, Food and Pharmacy > Department of Chemistry
Interdisciplinary centres and themes > Chemical Analysis Facility (CAF) > NMR (CAF)
ID Code:95969
Publisher:Nature Publishing Group

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