6533b85bfe1ef96bd12ba2ec

RESEARCH PRODUCT

Properties of amphiphilic terminally substituted conjugated nonaene- and 2-docosylnonaene carboxylic acids in monolayers at the air-water interface

subject

description

was a lo-' M Co(NO,), + lo-' M CH,COONa solution, with pH 7.5; the counter electrode was a Pt sheet, conveniently located in the electrochemical cell. After deposition, the electrochemical/electrochromic properties of the films were analyzed in degassed lo-' M KOH electrolyte, in a three electrode cell (Pt wire counter electrode, saturated calomel reference electrode) with optical windows. A PAR 173 potentiostat-galvanostat associated with a PAR 175 function generator was used in the electrochemical experiments. Data were recorded in a analogical X-Y (X-T) recorder. Monochromatic transmission (He-Ne laser, A = 632.8 nm) was recorded in situ, by means of a versatile optical bench; spectral transmittance in the visible-near infrared were measured in a Lambda-9 double beam spectrophotometer (Perkin-Elmer Corp.), by placing the electrolytic cell in the optical path of one of the beams, at different color states. In this work, all transmittance values are quoted relative to the system cell + electrolyte, to which the 100% value is attributed.