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Multichromic polymers of benzotriazole derivatives: Effect of benzyl substitution
Date
2011-02-01
Author
Yigitsoy, Basak
Karim, S. M. Abdul
Balan, Abidin
Baran, Derya
Toppare, Levent Kamil
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Two electroactive monomers 1-benzyl-4,7-di(thiophen-2-yl))-2H-benzo[d][1,2,3]triazole (BBTA) and 2-benzyl-4,7-di(thiophen-2-yl))-2H-benzo[d][1,2,3]triazole (BBTS) were synthesized with satisfactory yields. The effect of substitution site on electrochemical and optical properties was investigated with cyclic voltammetry and spectroelectrochemical studies. Results showed that position of pendant group alters the electronic structure of the resulting polymer causing different optical and electrochemical behaviors. Symmetrically positioned benzyl unit on benzotriazole moiety resulted in a neutral state red polymer. PBBTS, having multi-colored property in its different oxidized and reduced states. Its analogue PBBTA exhibited maximum absorption at 390 nm in its neutral state and also revealed multicolored electrochromic property upon stepwise oxidation. Very different optical band gap values were calculated: 1.55 eV and 2.25 eV for PBBTS and PBBTA, respectively.
Subject Keywords
Electrochemistry
,
General Chemical Engineering
URI
https://hdl.handle.net/11511/39957
Journal
ELECTROCHIMICA ACTA
DOI
https://doi.org/10.1016/j.electacta.2010.11.052
Collections
Department of Chemistry, Article
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B. Yigitsoy, S. M. A. Karim, A. Balan, D. Baran, and L. K. Toppare, “Multichromic polymers of benzotriazole derivatives: Effect of benzyl substitution,”
ELECTROCHIMICA ACTA
, pp. 2263–2268, 2011, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/39957.