Electrochromic Properties of a Copolymer of 1-4-Di[2,5-di(2-thieny1)-1H-1-pyrroly1]benzene with EDOT

Date

2009-04-15

Author

KİRALP, S
ÇAMURLU, PINAR
Günbaş, Emrullah Görkem
Tanyeli, Cihangir
AKHMEDOV, I
Toppare, Levent Kamil

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Homopolymer of 1-4-di[2,5-di(2-thienyl)- 1H-1-pyrroly1]benzene and its copolymer with 3,4-ethylenedioxythiophene (EDOT) were electrochemically synthesized and characterized. Resulting homopolymer and copolymer films have distinct electrochromic properties. At the neutral state, homopolymer has lambda(max) due to the pi-pi* transition as 410 nm and E-g was calculated as 2.03 eV. The resultant copolymer revealed multichromism through the entire visible region, displaying red-violet, brownish yellow green, and blue colors with the variation of the applied potential. For the copolymer, lambda(max) and E-g were found to be 450 nm and 1.66 eV, respectively. Double potential step chronoamperometry experiment shows that homopolymer and copolymer films have good stability, fast switching times, and high optical contrast in NIR region as 41 and 30%, respectively. Copolymerization with EDOT not only decreases the band gap, E-g, but also enhances the electrochromic properties. Hence, electrochemical copolymerization is considered to be a powerful tool to improve the electrochromic properties of N-substituted 2,5-di(2-thienylpyrrole) derivatives. (C) 2009 Wiley Periodicals, Inc. J Appl Polym Sci 112: 1082-1087, 2009

Subject Keywords

Electrochemical polymerization, Conducting polymer, Multichromism, Copolymerization, Optical contrast, Electrochromism

URI

https://hdl.handle.net/11511/42155

Journal

JOURNAL OF APPLIED POLYMER SCIENCE

DOI

https://doi.org/10.1002/app.29544

Collections

Department of Chemistry, Article

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Citation Formats

S. KİRALP, P. ÇAMURLU, E. G. Günbaş, C. Tanyeli, I. AKHMEDOV, and L. K. Toppare, “Electrochromic Properties of a Copolymer of 1-4-Di[2,5-di(2-thieny1)-1H-1-pyrroly1]benzene with EDOT,” JOURNAL OF APPLIED POLYMER SCIENCE, pp. 1082–1087, 2009, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/42155.