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A fast switching, low band gap, p- and n-dopable, donor-acceptor type polymer
Date
2008-04-01
Author
Günbaş, Emrullah Görkem
Akhmedov, Idris Mecidoglu
Tanyeli, Cihangir
Önal, Ahmet Muhtar
Toppare, Levent Kamil
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Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License
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A new electrochromic polymer, poly(2,3-diplienyl-5,7-bis(3,4-ethylenedioxy-2-thienyl)thieno[3,4-b]pyrazine) (PGS) is electrochemically synthesized and its electrochromic properties are reported. PGS showed well defined electrochemical characteristics with a relatively low oxidation potential of 0. 18 V vs Ag/Ag+. Polymer also exhibited a definite redox couple at applied cathodic potentials, indicating n-doping characteristic of the polymer. Spectroelectrochemistry and previously unattempted technique, ESR data was utilized to confirm the existence of dual type pi-pi* transitions centered at 522 nm and 1062 nm. The polymer exhibits multi-color electrochromism where three distinct colors are achievable by varying the redox state of the polymer between saturated red-purple color, blue and colorless-gray in neutral, n- and p-doped states, respectively. Copolymerization as a facile method to tune the electrochromic properties of the material was also realized in the presence of 2,2'-bis(3,4-ethylenedioxythiophene) (BiEDOT). Both polymers exhibit very short switching time (0.4 s) and express more than 45% change in the transmittance in the near-IR region, which could make these polymers useful in applications in NIR electrochromic devices.
Subject Keywords
Analytical Chemistry
,
Electrochemistry
,
General Chemical Engineering
URI
https://hdl.handle.net/11511/48888
Journal
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
DOI
https://doi.org/10.1016/j.jelechem.2007.11.035
Collections
Department of Chemistry, Article
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E. G. Günbaş, I. M. Akhmedov, C. Tanyeli, A. M. Önal, and L. K. Toppare, “A fast switching, low band gap, p- and n-dopable, donor-acceptor type polymer,”
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
, pp. 75–83, 2008, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/48888.