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Unraveling Mechanisms of Chiral Induction in Double-Helical Metallopolymers

Jake L. Greenfield, Emrys Evans, Daniele Di Nuzzo, Marco Di Antonio, Richard H. Friend, Jonathan R. Nitschke

Journal of the American Chemical Society, Volume: 140, Issue: 32, Pages: 10344 - 10353

Swansea University Author: Emrys Evans

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DOI (Published version): 10.1021/jacs.8b06195

Abstract

Self-assembled helical polymers hold great promise as new functional materials, where helical handedness controls useful properties such as circularly polarized light emission or electron spin. The technique of subcomponent self-assembly can generate helical polymers from readily prepared monomers....

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Published in: Journal of the American Chemical Society
ISSN: 0002-7863 1520-5126
Published: American Chemical Society (ACS) 2018
Online Access: Check full text

URI: https://cronfa.swan.ac.uk/Record/cronfa57571
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Abstract: Self-assembled helical polymers hold great promise as new functional materials, where helical handedness controls useful properties such as circularly polarized light emission or electron spin. The technique of subcomponent self-assembly can generate helical polymers from readily prepared monomers. Here we present three distinct strategies for chiral induction in double-helical metallopolymers prepared via subcomponent self-assembly: (1) employing an enantiopure monomer, (2) polymerization in a chiral solvent, (3) using an enantiopure initiating group. Kinetic and thermodynamic models were developed to describe the polymer growth mechanisms and quantify the strength of chiral induction, respectively. We found the degree of chiral induction to vary as a function of polymer length. Ordered, rod-like aggregates more than 70 nm long were also observed in the solid state. Our findings provide a basis to choose the most suitable method of chiral induction based on length, regiochemical, and stereochemical requirements, allowing stereochemical control to be established in easily accessible ways.
College: College of Science
Funders: This work was funded by the UK Engineering and Physical Sciences Research Council (EPSRC EP/P027067/1 and EP/M01083x/1) and the European Research Council (ERC 695009).
Issue: 32
Start Page: 10344
End Page: 10353