Electrochemical Synthesis and Electrochromic Properties of Poly(3-bromothiophene) Films

Abstract

Electrochemical synthesis in a room temperature ionic liquid, 1-butyl-3-methyl-imidazolium tetrafluoroborate ([BMIBF 4 ), has been used to prepare electrochromic poly (3-bromothiophene) (PBrT). The PBrT films were characterized by fourier-transform infrared spectroscopies (FTIR) and scanning electron microscopy (SEM). Electrochemistry properties of the prepared film was characterized by cyclic voltammetry. Spectroelectrochemistry and electrochromic properties of the PBrT films were characterized using various experiment techniques in [BMIBF 4 . The thin films were red at its neutral state. After oxidization of the PBrT films, the films underwent reversible change to the blue.