Synthesis and characterisation of partially-conjugated 2,5-diallcoxy-p-phenylenevinylene light-emitting polymers

The synthesis and characterisation of precursor 2,5-dialkoxy-poly-p-phenyle nevinylenes (PPVs) 1-5 (1: R=n-hexyl, R'=methyl; 2: R=R'=n-hexyl; 3: R=R'=m ethyl; 4:R=n-octyl, R'=methyl; 5:R=R'=2-ethylhexyl) is reported. The monome rs were prepared by alkylation of hydroquinone followed by chloro- or bromo methylation. They were then polymerized by base-catalyzed elimination of HX (X=Cl, Pr) to give the precursor polymers for the corresponding 2,5-dialko xy-poly-p-phenylenevinylenes (PPVs).