Electrochemical polymerization of β-naphthalene sulfonic acid in the mixed electrolyte of boron trifluoride diethyl etherate and trifluoroacetic acid

β-Naphthalene sulfonic acid (β-NSA) has been electrochemically polymerized in a mixed electrolyte of boron trifluoride diethyl etherate (BFEE) solution and trifluoroacetic acid (TFA). As-grown poly(β-naphthalene sulfonic acid) (PNSA) is partly soluble in methanol and has a conductivity of 0.95 S cm−1. Its structure has been examined by infrared, H1-NMR and UV spectra. Fluorescent spectral studies indicate that the polymer is a blue light emitter with a fluorescence quantum efficiency of 4%.