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Thieno[3,2-13]thiophene as pi-bridge at different acceptor systems for electrochromic applications
Date
2014-06-19
Author
TOKSABAY, Sinem
HACIOGLU, Serife O.
UNLU, Naime A.
Çırpan, Ali
Toppare, Levent Kamil
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Benzoselenadiazole, quinoxaline and thieno[3,2-b]thiophene are the units preferred in conducting polymers due to their electrochemical properties. There are no reports in the literature on polymers containing both moieties. In this study, novel benzoselenadiazole, quinoxaline and thieno[3,2-b]thiophene based monomers; 4-(3a,6a-dihydrothieno[3,2-b]thiophen-2-y1)-7-(thieno[3,2-b]thiophenyl) benzo[c][1,2,51selenadiazole (BSeTT) and 2,3-bis(3,4-bis(decyloxy)phenyl)-5,8-dibromo-2,3dihydroquinoxaline (QTT) were synthesized via Stille Coupling and polymerized electrochemically. These polymers were characterized in terms of their spectroelectrochemical and electrochemical properties by cyclic voltammetry and UV Vis NIR spectroscopy. Spectroelectrochemistry analysis of PBSeTT revealed an electronic transition at 525 nm corresponding to pi-pi* transition with a band gap of 0.93 eV whereas PQTT revealed electronic transitions at 440 and 600 nm corresponding to pi-pi*transitions with a band gap of 1.30 eV. Electrochromic investigations showed that PBSeTT has gray color PQTT switching between green and gray. Switching time of the polymers was evaluated by a kinetic study upon measuring the percent transmittance (%T) at the maximum contrast point.
Subject Keywords
Conjugated polymers
,
Electrochromism
,
Thieno[3,2-b]thiophene
URI
https://hdl.handle.net/11511/34429
Journal
POLYMER
DOI
https://doi.org/10.1016/j.polymer.2014.05.029
Collections
Department of Chemistry, Article
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S. TOKSABAY, S. O. HACIOGLU, N. A. UNLU, A. Çırpan, and L. K. Toppare, “Thieno[3,2-13]thiophene as pi-bridge at different acceptor systems for electrochromic applications,”
POLYMER
, pp. 3093–3099, 2014, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/34429.