Electrochromic properties of methylol modified poly (3, 4-propylenedioxythiophene) and its copolymer with poly (3, 4-ethylenedioxythiophene)

Abstract

A functionalized monomer (3, 4-dihydro-2H-thieno [3, 4-b] [1, 4] dioxepin-3-yl) methanol (ProDTM) was synthesized in one step and corresponding polymer PProDTM and copolymer of ProDTM-EDOT films were obtained by electrochemical deposition. Both PProDTM and copolymer films shown light blue in the oxidized state, while in the reduced state PProDTM and copolymer films shown purple and dark blue, respectively. The optical contrast of PProDTM and copolymer films reached 43.6% and 27.7%. In addition, the coloration efficiency of PProDTM and copolymer films reached 91.3 and 107.8 cm²C^-1. The results of electrochemical and electrochromic property shown that the PProDTM and copolymer films potential application in electrochromic field.