Electrochemical and optical properties of dicyclohexylmethyl substituted poly(3,4‐propylenedioxythiophene) analogue

Abstract

An analogue of disubstituted 3,4‐propylenedioxythiophenes, namely 3,3‐bis(cyclohexylmethyl)‐3,4‐dihydro‐2H‐thieno[3,4‐b][1,4]dioxepin (ProDOT‐CycHex2), was synthesized and its electrochemical polymerization was carried out successfully in an electrolyte solution of 0.1 M tetrabutylammonium hexafluorophosphate dissolved in a mixture of acetonitrile and dichloromethane (3/1: v/v). The corresponding polymer called PProDOT‐CycHex2 has a reduced band gap of 1.85 eV and an electrochromic property: blue/violet when neutralized and highly transparent when oxidized. Also, PProDOT‐CycHex2 film exhibited faster response time (0.7 s) and higher coloration efficiency (769 cm2/C) during oxidation when compared to its benzyl substituted analogue. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 46214.

π-Conjugated Polymers and Their Application in Organic and Hybrid Organic-Silicon Solar Cells

“…Reproduced with permission from reference[68], copyright (2019), Elsevier.Numerous varieties of linear and branched conjugated polymers have been extensively and successfully synthesized using this route. For example, Cakal et al[69] prepared an analogue of disubstituted 3,4-propylenedioxythiophenes, namely poly(3,3bis(cyclohexylmethyl)-3,4-dihydro-2H-thione[3,4-b][1,4] dioxepin) (P22ProDOT-CycHex2), which was carried out in an electrolytic solution of 0.1 M tetrabutylammonium hexaflourophosphate (TBAH) dissolved in a mixture of acetonitrile (ACN) and dichloromethane (DCM). This polymer exhibited a faster response time (0.7 s) and a higher coloration efficiency (769 cm 2 /C) during oxidation, which showed a potential towards application in electrochromic devices.…”