Synthesis of a new monomer, 2,5-bis-(2,3-dihydrothieno[3,4-b][1,4]dioxin-5- yl)-1-phenyl-1H-pyrrole (ENE), from pyrrole, iodobenzene and 3,4-ethylenedioxythiophene (EDOT), and its electropolymerization are reported. ENE was oxidized at a low oxidation potential (0.45 V vs. Ag/AgCl) and successfully electropolymerized in acetonitrile containing 0.1 M NaClO 4 and LiClO4 electrolyte mixture. The resulting polymer, P(ENE), revealed five distinctive colors upon doping, which indicated that the polymer is multichromic. P(ENE) has a coloration efficiency of 288 cm 2/C at 422 nm with a specific optical band gap of 2.0 eV. Furthermore, an electrochromic device (ECD) based on P(ENE) and poly(ethylene dioxythiophene) (PEDOT) was constructed and its switching was investigated by UV-vis spectroscopy. © 2014 Published by Elsevier B.V.