Optical characterization of polymethylmethacrylate–poly(3-alkylthiophene) Langmuir–Blodgett films

We have synthesized a highly regioregular poly(3-alkylthiophene) containing an oxygen atom in the side chain, poly(3-pentylmethoxythiophene) (P5OMe). We have studied the formation of Langmuir–Blodgett (LB) multilayer structures prepared by mixing P5OMe with highly isotactic polymethylmethacrylate (PMMA), and we have characterized the structure obtained by means of UV–Visible absorption, photoluminescence measurements and AFM. A certain degree of orientation of the macromolecules in the dipping direction was observed.