The substitution effects of donor and acceptor on properties of poly(1,4-phenylenevinylene) derivatives. Syntheses of poly(2-methoxy-5-methylsulfinyl-1,4-phenylenevinylene) and its copolymers

Electron donor and acceptor substituted poly(2-methoxy-5-methylsulfinyl- 1,4-phenylenevinylene) (PMMSPV) and a series of copolymers containing 1,4-phenylenevinylene (PV) units were synthesized via the water-soluble precursor pathway and cast into films. The electrical conductivity of FeCl 3 -doped PMMSPV was 1.5 x 10 -4 S. cm -1 and the copolymers showed conductivities in the range of 10 -4 ∼ 10 -1 S. cm -1 depending on the copolymer compositions. The second-order nonlinear optical coefficient of PMMSPV was obtained with second harmonic generation method. The measured d 33 value was 1.5 pm/V and gave no decay at 100°C over 40 d.