Polyarylenealkenylenes and polyheteroarylenealkenylenes, 17. Syntheses of alkoxylated poly(2-nitro-1,4-phenylenevinylene-1,4-phenylenevinylene)s and poly(2,5-dimethoxy-1,4-phenylenevinylene-1,4-phenylenevinylene)s,and study of their electrical conductivity

The influence of different substituents (nitro and methoxy groups) on the physical properties — fusibility and solubility — and the electrical conductivity of alkoxylated poly(1,4-phenylenevinylene-1,4-phenylenevinylene)s ( 9, 10, 12 and 13 ) and of the corresponding model compounds ( 15, 16, 18 and 19 ), were studied. The conductivity at room temperature, σ_298K, was found to be generally increased for polymers with nitro substituents by 2–3 orders of magnitude and for dimethoxy substituted polymers up to 4 orders of magnitude, as compared with the unsubstituted polyvinylenes. Iodine doped polyvinylenes show as an average d. c. electrical conductivities 2 orders of magnitude higher than those of the original polymers.