THIN-LAYER SPECTROELECTROCHEMICAL CELL WITH OPTICAL FIBERS FOR LOW-TEMPERATURE MEASUREMENTS

A versatile thin-layer spectroelectrochemical cell, in which the thin- layer channel is easily constructed by holding a platinum mesh between two fiber optical guides, is described. The thin-layer cyclic voltamm etry, chronocoutometry and spectroelectrochemistry are conducted in th e temperature range of -50 to 50-degrees-C. The solution resistance is 100 OMEGA and the time required for complete electrolysis is 30 s in acetonitrile containing 0.5 mol/dm3 tetrabutylammonium hexafluorophosp hate. The usefulness of spectroelectrochemical measurements at a low t emperature using this cell is demonstrated by obtaining the visible ab sorption spectrum of an electrogenerated dinuclear palladium(III) comp lex in N,N-dimethylformamide.