A series of alkoxy-substituted poly(p-phenylene) derivatives were synthesized using the well-known Suzuki reaction. The present polymers have strong UV-visible absorption bands around 340 approx. 450 nm and their PL spectra give a highest peak around 430 approx. 550 nm in the blue-green region. In this paper, π-conjugated chain lengths were molecularly regulated, leading to the color tune from PPP-based materials. Their EL spectra in a single-layered device show a highest peak around 430 approx. 550 nm in the blue-green region with the operating voltage of lower than 7V. Also, the photo-oxidation for poly(p-phenylene) derivatives in air was studied.
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