ABSTRACT
Three types of compounds from polythiopene family of conducting polymers have been studied: poly(3-alkylthiophenes), poly(4,4 '-dialkylbithiophenes) and poly(3-alkoxythiophenes). In each case FeCl3 was used as the oxidizing/polymerizing agent. Polydialkylbithiophenes distinguish themselves from the other two groups by their better stereoregularity which is manifested in 1H NMR and cyclic voltammetry studies. This observation is further corroborated by optical and spin responses to the potential change which show that polaron formation and their anihilation to bipolarons occurs in a much narrower potential range as compared to polyalkylthiophenes and polyalkoxythiophenes.
