Electrochromic-Energy Storage Smart Copolymers Based on Thienothiophene - Triphenyamine and EDOT

Sezer E., Topal S., Ustamehmetoğlu B., Öztürk T.

• OrgChemTr-5 (5th Organic Chemistry Congress 2021), Malatya, Turkey, 14 October 2021 - 17 January 2022, pp.55

  • Publication Type: Conference Paper / Summary Text
  • City: Malatya
  • Country: Turkey
  • Page Numbers: pp.55
  • Istanbul Technical University Affiliated: Yes


High energy demand and environmental pollution are almost the main issues of the 21st century, which demand enlargement of renewable resources and improvement of energy-efficient technologies [1]. Conducting polymers (CP) have made a great impact on applications of modified electrodes such as electrochromic, energy storage, electroanalysis, and sensors due to their unique abilities such as reversible doping/dedoping process, tunable chemical and electrochemical properties and easy processability [2,3] As an alternative to PTh, fused two thiophene, namely thieno[2,3-b]thiophenes (TT), plays important roles on the syntheses of conducting polymers due to their rigid planer structures and good π-conjugation systems [4]. Another important organic compound triphenylamine (TPA) unit are widely used in electronic and optoelectronic materials. It is an efficient electron rich hole transporter, which has fine film forming property and low oxidation potential [5]. Thus, the synthesis of a new TT derivative, possessing a strong electron donating TPA group (TTpTPA) through Suzuki cross-coupling reaction, along with its electropolymerization, electrochromic properties, and capacitive behaviors were reported in our previous study [6]. In this work, we studied the capacitive properties of its polymer having EDOT units on the polymer backbone. The polymer films were electropolymerized on ITO electrode at room temperature in 1 M TBAPF6 ACN:DCM (1:4, v/v) solution with fixed 1 mM total monomer concentration (different ratio of  TTpTPA and EDOT) the deposition voltage ranged between -0.2 – 1.7 V using three electrode configuration. Then, electrochromic and energy storage properties of these different copolymer films were investigated by using electrochemical and spectrochemical methods.