Hydrogen bonding as a tool to control chain structure of PEDOT: electrochemical synthesis in the presence of different electrolytes

0523813 - ÚMCH 2021 RIV US eng J - Journal Article
Ivanko, Iryna - Svoboda, Jan - Lukešová, Miroslava - Šeděnková, Ivana - Tomšík, Elena
Hydrogen bonding as a tool to control chain structure of PEDOT: electrochemical synthesis in the presence of different electrolytes.
Macromolecules. Roč. 53, č. 7 (2020), s. 2464-2473. ISSN 0024-9297. E-ISSN 1520-5835
R&D Projects: GA ČR(CZ) GA19-04859S
Institutional support: RVO:61389013
Keywords : PEDOT * electrostatic interaction * H-bonding
OECD category: Polymer science
Impact factor: 5.985, year: 2020
Method of publishing: Limited access
https://pubs.acs.org/doi/abs/10.1021/acs.macromol.9b02627

The current knowledge about the presence of cation radicals in organic semiconductors is connected with oxidized constitutional units and their interaction with counterions. In this work, we have shown that the formation of cation radicals in poly(3,4-ethylenedioxythiophene) is induced by intermolecular electrostatic interactions, particularly by hydrogen-bond formation between formic acid and polymer. Raman, XPS, UV–vis, and EPR spectroscopies were used to prove that by using the simplest carboxylic acid, which can form hydrogen bonding, it is possible to form localized cation radicals. Moreover, it was shown that by replacing formic acid with o-phosphoric acid, it is possible to obtain delocalized cation radicals. The gained new understanding how to tune the formation and nature of cation radicals in organic semiconductors can be used in the design of organic electronics.
Permanent Link: http://hdl.handle.net/11104/0308432