Abstract
Poly(3′,4′-Ethylenedioxy-2,2′:5′,2″-terthiophene) was synthesized by chemical oxidative polymerization of 3′,4′-Ethylenedioxy-2,2′:5′,2″-terthiophene using FeCl3 as an oxidant. The resulting polymer was characterized by FTIR and 1H NMR. p-doping behaviors of substituted polyterthiophene with different organic sulfonic acids (methanesulfonic acid, p-toluene sulfonic acid, and β-naphthalene sulfonic acid) in different solvents (CH3CN, CHCl3, THF and DMF) were studied by UV-VIS spectroscopy. The results from structural characterizations showed that the α,α′-bonding predominates in polyterthiophene. The spectroscopic changes in UV-VIS showed that β-naphthalene sulfonic acid was an efficient doping acid for polymer while varying the solvents. Meanwhile, CH3CN showed a high efficiency for p-doping of polyterthiophene while varying the doping acids.
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