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Three novel soluble copolymers of poly(3-penthylthiophene) [P(3PT)] and poly(3-phosphate diethyl 3-thienylmethyl) [P(3FT)] of different molar ratios of co-mers (3:1, 1:1 and 1:3) have been chemically synthesised. The final copolymers were obtained by functionalisation of poly(3-penthylthiophene-co-3-bromomethylthiophene) [P(3PT-co-3BT)] copolymers, because P(3FT) monomer does not couple in position 2-5′ of the copolymers. The structure and physical-chemical properties of resulting polymer was investigated by nuclear magnetic resonance (NMR), Fourier transform infrared spectroscopy (FTIR), visible and ultraviolet spectroscopy (UV-Vis), photoluminescence and direct current (DC) measurements. By changing the molar ratios of monomers during synthesis we can “tailor” the photoemission of resulting copolymers. The room temperature conductivity distinctly increases after doping by electrons’ acceptor. The polymers studied are good candidates for potential commercial applications.

The soluble copolymers of polyalkylthiophenes with different molar ratios of co-mers