Synthesis and properties of polyether with short alternating conjugated and nonconjugated blocks containing oxadiazole units

A polyether,poly[(2,5-dimethylene-1,3,4-oxadiazole)dioxy-1,4-phenylene-1,2-ethenyl ene-1,4-phenylene-1,2-ethenylene-1,4-phenylene], based on short alternating conjugated oxadiazole units, has been synthesized, which is a kind of PPV derivative that emits blue light. The resulting polymer is fairly soluble in chloroform. The synthesized polymer shows a UV-visible absorbency maximum wavelength around 310 nm in solution. The photoluminescence maximum wavelength for the resulting polymer appears around 470 nm. The polymer also exhibits good thermal stability up to 300°C under N₂ atmosphere. It is also observed that the onset temperature of thermal decomposition is as high as 355°C.