Synthesis and Electropolymerization of Furan End?capped Dibenzothiophene/Dibenzofuran and Electrochromic Properties of Their Polymers

摘要： Two furan end?capped dibenzothiophene/dibenzofuran five?membered ring monomers, 2,8?bis?(furan?2?yl)?dibenzothiophene (DBT?Fu) and 2,8?bis?(furan?2?yl)?dibenzofuran (DBF?Fu) were successfully synthesized via Stille couple reaction. Corresponding polymers, P(DBT?Fu) and P(DBF?Fu), were obtained by employed the electropolymerization. The surface morphology, electrochemical and optical properties of monomers and polymers were researched by cyclic voltammetry (CV), scanning electron microscopy (SEM), and UV?via spectra method. Both polymers exhibited obvious color changes from neutral state to oxidation state (from green?yellow to dark grey for P(DBT?Fu) and from beige to celadon for P(DBF?Fu)).