Synthesis and electropolymerization of 1,2-bis(thiophen-3-ylmethoxy)benzene and its electrochromic properties and electrochromic device application

摘要

A new thiophene-based monomer; 1,2-bis(thiophen-3-ylmethoxy)benzene (BTMB) has been synthe-sized and chemical structure of the monomer was characterized. Polymerization of BTMB and charac-terization of the resulting polymer P(BTMB) were performed. Spectroelectrochemical analysis of the P(BTMB) reflected electronic transitions at 400 nm, 520 nm and ～720 nm, corresponding to π-π~* tran-sition, polaron and bipolaron band formation respectively. Switching ability was evaluated by a kineticstudy via measuring the transmittance (%T) at the maximum contrast. Dual type all polymer electro-chromic device (ECD) based on P(BTMB) and poly(ethylene dioxythiophene) (PEDOT) was constructed.Spectroelectrochemistry and switching ability of the devices were investigated by UV—vis spectroscopy.