Influence of side chain isomerism on the rigidity of poly(3-alkylthiophenes) in solutions revealed by neutron scatteringThis manuscript has been authored by UT-Battelle, LLC under Contract No. DE-AC05-00OR22725 with the U.S. Department of Energy. The United States Government retains and the publisher, by accepting the article for publication, acknowledges that the United States Government retains a non-exclusive, paid-up, irrevocable, and world-wide license to publish or reproduce the published

Using small-angle neutron scattering, we conducted a detailed conformational study of poly(3-alkylthiophene) solutions in deuterated dichlorobenzene. The focus was placed on addressing the influence of the spatial arrangement of side chain constituents on backbone conformation. We demonstrate that b...

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Main Authors: Hong, William D, Lam, Christopher N, Wang, Yangyang, He, Youjun, Sánchez-Díaz, Luis E, Do, Changwoo, Chen, Wei-Ren
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Summary:Using small-angle neutron scattering, we conducted a detailed conformational study of poly(3-alkylthiophene) solutions in deuterated dichlorobenzene. The focus was placed on addressing the influence of the spatial arrangement of side chain constituents on backbone conformation. We demonstrate that by introducing a branch point in the side chain, side chain steric interactions may promote torsional motion between backbone units, resulting in greater chain flexibility. Our findings highlight the key role of topological isomerism in determining the chain rigidity and throw new light on the debate about the effective approaches for optimizing the electronic properties of conducting polymers via side chain engineering. Using small-angle neutron scattering, we conducted a detailed conformational study of poly(3-alkylthiophene) solutions in deuterated dichlorobenzene.
ISSN:1463-9076
1463-9084
DOI:10.1039/c8cp07520d