High quality freestanding polyfluorene network films were synthesized successfully in CH2Cl2 containing additional 40%(by volume) boron trifluoride diethyl etherate (BFEE) by direct anodic oxidation of its precursor polymer

a polyacrylate functionalized with fluorene

which was first obtained through radical polymerization of fluorenyl acrylate.The possibility of inter and intramolecular oxidation cross\|linking resulted in a crosslinked conjugated network microstructure.UV-Visible and FTIR spectra were used to study the structures of the polymers

respectively.According to the UV-Visible spectra of FM

poly(fluorenyl acrylate) (PFM) and cross-linked poly(fluorenyl acrylate) (CPFM)

the spectra of CPFM showed red-shifted absorption at 352 nm compared to those of FM and PFM

indicating higher conjugation length of the backbone of the polymer.In the FTIR spectrum of CPFM

three peaks at 800

754 and 720 cm-1 suggested that CPFM was 1

2

4trisubstituted.Furthermore

the maximum emission peak of PFM appeared at 346 nm while that of CPFM in solid state appeared at 415 nm

implying the blue-light emitting property of CPFM.Polyfluorene network films obtained from this medium showed good thermal stability.Scanning electron microscopic results indicated that network CPFM films composed of ordered nanostructures were obtained electrochemically in this paper.