Direct electrosynthesis and characterization of a new soluble polyfluorene derivative containing carboxyl group in boron trifluoride diethyl etherate

Key Words:Conducting polymer; Electrochemical polymerization; Poly(fluorene-9-acetic acid); Boron trifluoride diethyl etherate; Polyfluorene

Abstract:High-quality poly(fluorene-9-acetic acid) (PFAA), a new soluble polyfluorene derivative, was synthesized electrochemically by direct anodic oxidation of fluorene-9-acetic acid (FAA) in boron trifluoride diethyl etherate (BFEE) containing a certain amount of trifluoroacetic acid (TFA). This electrolyte enables facile anodic oxidation of FAA monomer at lower potential (1.05 V vs. SCE). PFAA films with conductivity of 0.53 S cm(-1) obtained from this medium showed better redox activity and thermal stability in relation to unsoluble poly(fluorene-9-carboxylic acid). Fluorescent spectral studies indicate that PFAA film with high fluorescence quantum yields and photochemical stability is a good blue-light emitter. The structure and morphology of the polymer were studied by UV-vis, FT-IR, (1)H NMR spectra and scanning electron microscopy, respectively. (C) 2009 Elsevier Ltd. All rights reserved.

Volume:45

Issue:9

Translation or Not:no