Electrochromism of poly-N-methylpyrrole films in acetonitrile and water

摘要: Films of poly-N-methylpyrrole grown on Au electrodes can be electrochemically driven between the oxidized (conducting, dark) and neutral (insulating, light) forms in CH3,CN H2O electrolytes. Cyclic voltammograms show that oxidation potential films is considerably lower than CH3 CN. This difference affects optical density change accompanies oxidation-reduction so maximum reflected light from pulsed states observed at ≥ 800 nm but 580 It also shown while film properties conductivity electrochromism are closely related, it color which much more sensitive to concentration type electrolyte salt. Pulsing 1 M aqueous solutions MCl where M+is NH4, Me4N, or Et4N shows smallest cation, results fastest electrochromic switching speeds.