Synthesis, characterization and properties of a novel silicon-substitutedsoluble polymer with a PPV structure

Abstract

Soluble poly(2,5-di-t-butyldimethylsilyloxy-1,4-phenylenevinylene) was prepared via a Stille coupling reaction between 2,5-diiodo-1,4-bis-(t- butyldimethylsilyloxy)benzene and E-1,2-bis(tri-n-butylstannyl)ethylene in the presence of tetrakis-(triphenylphosphine)palladium(0) as the catalyst. The characterization of this material by 1H- and 13C- NMR, UV-Vis., and IR spectroscopies is described. The molecular weights, determined by GPC analysis and referred to standard polystyrene, were Mn = 2027 and MW = 2621. Photoluminescence measurements were performed in solution and on thin films of pure material or of a blend with polystyrene.