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Title: Unusual Internal Electron Transfer in Conjugated Radical Polymers

Abstract

Abstract Nitroxide‐containing organic radical polymers (ORPs) have captured attention for their high power and fast redox kinetics. Yet a major challenge is the polymer's aliphatic backbone, resulting in a low electronic conductivity. Recent attempts that replace the aliphatic backbone with a conjugated one have not met with success. The reason for this is not understood until now. We examine a family of polythiophenes bearing nitroxide radical groups, showing that while both species are electrochemically active, there exists an internal electron transfer mechanism that interferes with stabilization of the polymer's fully oxidized form. This finding directs the future design of conjugated radical polymers in energy storage and electronics, where careful attention to the redox potential of the backbone relative to the organic radical species is needed.

Authors:
 [1];  [1];  [1]; ORCiD logo [1]
  1. Texas A & M Univ., College Station, TX (United States)
Publication Date:
Research Org.:
Texas A & M Univ., College Station, TX (United States). Texas A & M Engineering Experiment Station
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES); Welch Foundation
OSTI Identifier:
1533114
Alternate Identifier(s):
OSTI ID: 1378296
Grant/Contract Number:  
SC0014006; A-1766
Resource Type:
Accepted Manuscript
Journal Name:
Angewandte Chemie (International Edition)
Additional Journal Information:
Journal Name: Angewandte Chemie (International Edition); Journal Volume: 56; Journal Issue: 33; Journal ID: ISSN 1433-7851
Publisher:
Wiley
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; chemistry; conjugated radical polymers; lithium polymer batteries; organic radical polymers polythiophene · TEMPO

Citation Formats

Li, Fei, Gore, Danielle N., Wang, Shaoyang, and Lutkenhaus, Jodie L. Unusual Internal Electron Transfer in Conjugated Radical Polymers. United States: N. p., 2017. Web. doi:10.1002/anie.201705204.
Li, Fei, Gore, Danielle N., Wang, Shaoyang, & Lutkenhaus, Jodie L. Unusual Internal Electron Transfer in Conjugated Radical Polymers. United States. https://doi.org/10.1002/anie.201705204
Li, Fei, Gore, Danielle N., Wang, Shaoyang, and Lutkenhaus, Jodie L. Fri . "Unusual Internal Electron Transfer in Conjugated Radical Polymers". United States. https://doi.org/10.1002/anie.201705204. https://www.osti.gov/servlets/purl/1533114.
@article{osti_1533114,
title = {Unusual Internal Electron Transfer in Conjugated Radical Polymers},
author = {Li, Fei and Gore, Danielle N. and Wang, Shaoyang and Lutkenhaus, Jodie L.},
abstractNote = {Abstract Nitroxide‐containing organic radical polymers (ORPs) have captured attention for their high power and fast redox kinetics. Yet a major challenge is the polymer's aliphatic backbone, resulting in a low electronic conductivity. Recent attempts that replace the aliphatic backbone with a conjugated one have not met with success. The reason for this is not understood until now. We examine a family of polythiophenes bearing nitroxide radical groups, showing that while both species are electrochemically active, there exists an internal electron transfer mechanism that interferes with stabilization of the polymer's fully oxidized form. This finding directs the future design of conjugated radical polymers in energy storage and electronics, where careful attention to the redox potential of the backbone relative to the organic radical species is needed.},
doi = {10.1002/anie.201705204},
journal = {Angewandte Chemie (International Edition)},
number = 33,
volume = 56,
place = {United States},
year = {Fri Jun 23 00:00:00 EDT 2017},
month = {Fri Jun 23 00:00:00 EDT 2017}
}

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