Supramolecular Helical Miktoarm Star Polymers

Ru Deng; Chengyuan Wang; Marcus Weck

doi:10.1021/acsmacrolett.1c00802

Supramolecular Helical Miktoarm Star Polymers

Ru Deng, Chengyuan Wang, Marcus Weck

Chemistry

Research output: Contribution to journal › Article › peer-review

Abstract

We report a hydrogen-bonded supramolecular miktoarm star polymer containing three distinct helical arms. Our design involves two helical poly(methacrylamide) arms connected by a barbituric acid (Ba) at the center, prepared through the reversible addition-fragmentation chain-transfer polymerization with a bifunctional agent. Together with a telechelic helical poly(isocyanide) end-functionalized with a Hamilton Wedge (HW) that is complementary to Ba, the two components assemble into an AB₂-type star copolymer. The assembly is driven by the hydrogen bonding between HW and Ba, which is quantified by ¹H NMR titration and isothermal titration calorimetry. Gel-permeation chromatography provides evidence for the formation of the desired miktoarm star architecture. This strategy of site-specific functionalization on helical polymers provides a modular approach to preparing nonlinear supramolecular ensembles with topologically diverse building blocks.

Original language	English (US)
Pages (from-to)	336-341
Number of pages	6
Journal	ACS Macro Letters
Volume	11
Issue number	3
DOIs	https://doi.org/10.1021/acsmacrolett.1c00802
State	Published - Mar 15 2022

ASJC Scopus subject areas

Organic Chemistry
Polymers and Plastics
Inorganic Chemistry
Materials Chemistry

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10.1021/acsmacrolett.1c00802

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title = "Supramolecular Helical Miktoarm Star Polymers",

abstract = "We report a hydrogen-bonded supramolecular miktoarm star polymer containing three distinct helical arms. Our design involves two helical poly(methacrylamide) arms connected by a barbituric acid (Ba) at the center, prepared through the reversible addition-fragmentation chain-transfer polymerization with a bifunctional agent. Together with a telechelic helical poly(isocyanide) end-functionalized with a Hamilton Wedge (HW) that is complementary to Ba, the two components assemble into an AB2-type star copolymer. The assembly is driven by the hydrogen bonding between HW and Ba, which is quantified by 1H NMR titration and isothermal titration calorimetry. Gel-permeation chromatography provides evidence for the formation of the desired miktoarm star architecture. This strategy of site-specific functionalization on helical polymers provides a modular approach to preparing nonlinear supramolecular ensembles with topologically diverse building blocks.",

author = "Ru Deng and Chengyuan Wang and Marcus Weck",

note = "Funding Information: The authors acknowledge financial support from the National Science Foundation under Award Number CHE-1902917. We thank Veronica Grebe for writing the MATLAB code to process the CD and GPC data. Publisher Copyright: {\textcopyright} 2022 American Chemical Society. All rights reserved.",

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doi = "10.1021/acsmacrolett.1c00802",

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AU - Deng, Ru

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AU - Weck, Marcus

N1 - Funding Information: The authors acknowledge financial support from the National Science Foundation under Award Number CHE-1902917. We thank Veronica Grebe for writing the MATLAB code to process the CD and GPC data. Publisher Copyright: © 2022 American Chemical Society. All rights reserved.

PY - 2022/3/15

Y1 - 2022/3/15

N2 - We report a hydrogen-bonded supramolecular miktoarm star polymer containing three distinct helical arms. Our design involves two helical poly(methacrylamide) arms connected by a barbituric acid (Ba) at the center, prepared through the reversible addition-fragmentation chain-transfer polymerization with a bifunctional agent. Together with a telechelic helical poly(isocyanide) end-functionalized with a Hamilton Wedge (HW) that is complementary to Ba, the two components assemble into an AB2-type star copolymer. The assembly is driven by the hydrogen bonding between HW and Ba, which is quantified by 1H NMR titration and isothermal titration calorimetry. Gel-permeation chromatography provides evidence for the formation of the desired miktoarm star architecture. This strategy of site-specific functionalization on helical polymers provides a modular approach to preparing nonlinear supramolecular ensembles with topologically diverse building blocks.

AB - We report a hydrogen-bonded supramolecular miktoarm star polymer containing three distinct helical arms. Our design involves two helical poly(methacrylamide) arms connected by a barbituric acid (Ba) at the center, prepared through the reversible addition-fragmentation chain-transfer polymerization with a bifunctional agent. Together with a telechelic helical poly(isocyanide) end-functionalized with a Hamilton Wedge (HW) that is complementary to Ba, the two components assemble into an AB2-type star copolymer. The assembly is driven by the hydrogen bonding between HW and Ba, which is quantified by 1H NMR titration and isothermal titration calorimetry. Gel-permeation chromatography provides evidence for the formation of the desired miktoarm star architecture. This strategy of site-specific functionalization on helical polymers provides a modular approach to preparing nonlinear supramolecular ensembles with topologically diverse building blocks.

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Supramolecular Helical Miktoarm Star Polymers

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