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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Citation Formats

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.