Département de chimie moléculaire

Poly(1-amino-2-methyl-9,10-anthraquinone) (PAMAQ) was synthesized at glassy C (GC) electrode using 1-amino-2-methyl-9,10-anthraquinone (AMAQ) dissolved in a binary (1:1) solvent mixt. contg. MeCN (ACN) and 5 M H2SO4 employing a continuous cyclic voltammetry or controlled potential electrolysis (CPE) techniques. Electrochem. responses of the prepd. polymer films were studied in 1 M H2SO4 aq. soln. A no. of factors affecting the film formation such as potential limits, scan rates, no. of cycles, monomer concn., nature of electrolytes and polymn. techniques were examd. in details. The effect of scan rates and electrolyte compn. on the electroactivity of the resulting polymeric films were tested also. The optimum conditions for the film formation were sweeping the electrode potential between -0.7 V and +1.8 V at a scan rate of 50 mV/s for 25 cycles using 1 mM of the monomer (AMAQ). The prepd. modified electrode is highly electroactive and stable in 1 M H2SO4 supporting electrolyte but the polymn. process diminished completely when 0.1 M LiClO4/ACN or 0.1 M Bu4NClO4/ACN was used as a result of polymer instability and film solubilization. The soly. of the polymeric film was confirmed by following up the electropolymn. of AMAQ applying UV-visible technique. Poly(1-amino-9,10-anthraquinone) (PAAQ) was also prepd. using the same binary solvent mixt. The redox behavior and the stability of PAAQ are different in the neg. domain compared with PAMAQ. The effect of the presence of the Me group in the structure of the aminoquinone is discussed. [on SciFinder(R)]