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Two types of fluorene-based copolymers, poly(9,9'-di-n-hexyl-2,7-fluorenediylethynylene-alt-9-trimethylsilyl-2,7-fluoreneethynylene[P-1], poly(9,9'-di-n-hexyl-2,7-fluorenediylethynylene-alt-9,9'-bis-trimethylsilyl-2,7-fluoreneethynylene [P-2] were synthesized by employing palladium catalyzed polycondensation. Resulting polymers showed a good solubility in various organic solvents such as THF, chloroform, dioxane etc. and could be easily spin-coated onto an ITO glass plate to make a fine thin film. Characterization of these polymers includes FT-IR, UV-vis., 1 H and 13 C-NMR, was conducted. Thermal properties were also investigated by DSC and TGA as well as molecular weight studies. The present polymers exhibited emission of bluewhite color. The photoluminescence (PL) spectrum of the polymers showed two peaks at 490 and 540 nm and it was found that electroluminescence (EL) spectra of the polymer [P-2] was very similar to its PL spectrum.

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