Electrochemical and optical properties of solution processable benzotriazole and benzothiadiazole containing copolymers

Melike Karakus, Abidin Balan, Derya Baran, Levent Toppare, Ali Cirpan*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

19 Scopus citations


2-Dodecyl benzotriazole (BTz) and benzothiadiazole (BTd) containing alternating copolymers poly(4-(2-dodecyl-2H-benzo[d][1,2,3]triazol-4-yl)benzo[c] [1,2,5]thiadiazole (P1), poly(4-(5-(2-dodecyl-7-(thiophen-2yl)-2H-benzo[d][1,2, 3]triazol-4-yl)thiophen-2-yl)benzo[c] [1,2,5] thiadiazole (P2) and poly(4-(5-(2-dodecyl-7-(4-hexylthiophen-2-yl)-2H-benzo[d] [1,2,3]triazol-4-yl) -3-hexylthiophen-2-yl) benzo[c][1,2,5] thiadiazole (P3) were synthesized via Suzuki polycondensation reactions. The solubility of the polymers enabled spray coating to carry out the electrochemical and optical studies. Electronic and optical properties of resulting polymers showed that P2 is a great candidate to be used as processable blue electrochromic polymer which can switch to transparent upon oxidation. P3 was also investigated in terms of its electrochromic performance which has two different colored and a transparent states, whereas P1 does not exhibit any spectral change upon applied potentials. HOMO and LUMO values, band gaps and kinetic behavior of polymers upon externally applied potential are reported in detail.

Original languageEnglish (US)
Pages (from-to)79-84
Number of pages6
JournalSynthetic Metals
Issue number1-2
StatePublished - Feb 2012
Externally publishedYes


  • Benzothiadiazole
  • Benzotriazole
  • Donor acceptor copolymers
  • Electrochromism
  • Organic electronics

ASJC Scopus subject areas

  • Mechanical Engineering
  • Mechanics of Materials
  • Materials Chemistry
  • Metals and Alloys
  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics


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