New 3-substituted thiophene monomers have been synthesized. The substi
tuent is a benzene ring having an hexyl or octyl chain in the p-positi
on. These monomers have been polymerized chemically in a chloroform so
lution using ferric chloride as an oxidant. The resulting polymers hav
e been characterized and doped. The stability of the doped polymers ha
s been tested.