Poly(N—methylindole)films were synthesized electrochemically by direct anodie oxidation of N—methylindole in pure boron trifluoride diethyl etherate(BFEE)．The oxidation potential of N—methylindole in this medium was measured to be only 0.95 V versus SCE

which was lower than that determined in acetonitrile+0.1 mol／L Bu4NBF4(1．23 V)．Poly(N—methylindole)films obtained from this medium showed good electrochemical behavior and good chemical stability．Poly(N—methylindole)films in dedoped state is soluble in common strong polar organic solvents such as CH2Cl2

dimethyl sulfoxide(DMSO)

N

N—dimethylformamide(DMF)．Its structure has been examined by infrared and UV—spectra．Structural analysis confirmed that the polymerization of N-methylindole ring occurred at the 2

3 positions．Fluorescent spectral studies indicated that the emission spectrum had a peak at 380 nm.