Abstract
A series of silicon-based copolymers was synthesized by the Pd-catalyzed Heck reaction of the distyrylsilane monomers with various aromatic dibromides. The incorporation of organosilicon units with the flexible alkyl side group into the polymer rigid backbone would afford processable electroluminescent materials and interrupt the regular π-conjugated chains. The resulting polymers were highly soluble in common organic solvents. The UV-Visible absorbance of the present polymers shows strong absorption bands at around 365∼400 nm. Their maximum photoluminescence (PL) wavelength for SiPPV analogues appeared 470 nm in the blue emission region. The single layer light-emitting diode based on the present copolymer emits the blue emissive light at the operating voltage of 9 V.
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