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In Situ Spectroelectrochemical Study of Positively and Negatively Charged States in a Donor/Acceptor EDOT/Benzotriazole‐Based Polymer
Author(s) -
MeanaEsteban Beatriz,
Balan Abidin,
Baran Derya,
Neugebauer Helmut,
Toppare Levent,
Sariciftci Niyazi Serdar
Publication year - 2011
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/macp.201100322
Subject(s) - benzotriazole , fourier transform infrared spectroscopy , polymer , polymer chemistry , homo/lumo , acceptor , ambipolar diffusion , chemistry , materials science , in situ , photochemistry , chemical engineering , electron , molecule , organic chemistry , physics , condensed matter physics , quantum mechanics , engineering
Positively and negatively charged states in cPBEBT, which consists of EDOT/benzotriazole/EDOT as the building block, are studied using CV, in situ UV‐Vis, and FTIR‐ATR spectroscopy. The results show that cPBEBT is an ambipolar D‐A‐type polymer capable of conducting both holes and electrons. The injected positive and negative charges are distributed over the whole polymer backbone, which is proven by in situ FTIR‐ATR where spectral signatures associated with the benzotriazole unit are observed in both p‐ and n‐doped cPBEBT. HOMO and LUMO values obtained from CV and FTIR‐ATR experiments during oxidation and reduction are compared. cPBEBT is an example of the D‐A approach towards the improvement of the electronic properties of the resultant polymer.