SYNTHESIS AND SPECTRAL PROPERTIES OF POLY(ARYLENEVINYLENE)S INCORPORATING 2-METHOXY-5-(2'-ETHYLHEXYLOXY)-P-PHENYLENE FRAGMENTS IN THE POLYMER-CHAIN

We report the Wittig reactions of thylhexyloxy)-1,4-xylylenebis(triphe nylphosphonium bromide) with terephthalaldehyde, 1,4-naphthalenedicarb aldehyde and 9,10-anthracenedicarbaldehyde. Two sets of model compound s were synthesized. The first consisted of a central fragment of 2-met hoxy-5-(2'-ethylhexyloxy)-p-phenylenevinylene straddled by two phenylv inyl, naphthylvinyl or anthrylvinyl units. The second set contained de rivatives of distyrylbenzene, distyrylnaphthalene and distyrylanthrace ne with two methoxygroups in each styryl fragment. The photophysical b ehavior of the polymers and model compounds was investigated through a bsorbance, excitation and fluorescence spectroscopy.