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Engineering Polymers with Improved Charge Transport Properties from Bithiophene-Containing Polyamides

Abstract

Polymer semiconductors show unique combinations of mechanical and optoelectronic properties that strongly depend on their microstructure and morphology. Here, we have used a model π-conjugated bithiophene repeat unit to incorporate optoelectronic functionality into an aliphatic polyamide backbone by solution-phase polycondensation. Intermolecular hydrogen bonding between the amide groups ensures stable short-range order in the form of lamellar crystalline domains in the resulting semiaromatic polyamides, which could be processed from the melt and exhibited structural and thermomechanical characteristics comparable with those of existing engineering polyamides. At the same time, however, pulse-radiolysis time-resolved microwave conductivity measurements indicated charge carrier mobilities that were an order of magnitude greater than previously observed in bithiophene-based materials. Our results hence provide a convincing demonstration of the potential of amide hydrogen bonding interactions for obtaining unique combinations of mechanical and optoelectronic properties in thermoplastic polymers.

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Supplementary files

Article information


Submitted
29 Nov 2019
Accepted
14 Feb 2020
First published
14 Feb 2020

J. Mater. Chem. C, 2020, Accepted Manuscript
Article type
Paper

Engineering Polymers with Improved Charge Transport Properties from Bithiophene-Containing Polyamides

B. Özen, N. Candau, C. Temiz, F. Grozema, F. Fadaei Tirani, R. Scopelliti, J. Chenal, C. Plummer and H. Frauenrath, J. Mater. Chem. C, 2020, Accepted Manuscript , DOI: 10.1039/C9TC06544J

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