Poly 3-alkyloxythiophene s

The influence of side group distribution on the properties of substituted PBTs has been studied [506,507]. Poly(4,4 -dibutyl-2,2 -bithiophene) and poly(3,3 -dimethoxy-2,2 -bithiophene) correspond in their chain geometry to head-to-head and tail-to-tail coupled 3-substituted PTs. In cyclic voltammetry both polymers exhibit much narrower oxidation peaks as compared to the corresponding head-to-tail coupled PATs and poly(3-alkyloxythiophenes). Poly(dialkyloxy-2,2 -bithiophene)s seem to be more stereoregular compared to poly(3-alkyloxythiophene)s [506,507]. 

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