Investigations of Fast Electrode Kinetics for Reduction of 2,3,5,6-Tetrafluoro-7,7,8,8-tetracyanoquinodimethane in Conventional Solvents and Ionic Liquids Using Fourier Transformed Large Amplitude Alternating Current Voltammetry

Fourier transformed large amplitude alternating current voltammetry has been used under high frequency (up to 1.233 kHz) conditions to probe the fast electron transfer kinetics associated with the reduction of 2,3,5,6-tetrafluoro-7,7,8,8-tetracyanoquinodimethane (F₄TCNQ) in the molecular solvents acetonitrile and dimethylsulfoxide at glassy carbon, platinum, gold and boron doped diamond macrodisk electrodes and in ionic liquids (ILs) at carbon fiber and platinum microdisk electrodes. The limitations encountered with measurements under high frequency conditions are discussed in detail. Electrode kinetic data obtained for the F₄TCNQ^0/•– process in the molecular solvents (0.060–1.0 cm s^–1) are compared with results found in 1-butyl-3-methylimidazolium hexafluorophosphate, 1-butyl-1-methylpiperidinium bis­(trifluoromethylsulfonyl)­imide, and 1-butyl-1-methylpyrrolidinium bis­(trifluoromethylsulfonyl)­imide ionic liquids (0.0030–0.10 cm s^–1). The effect of solvent viscosity ranging from 0.30 to 371 cP on mass transport is substantial. The influences of the electrode material and structure of the cation of the ionic liquid on the electrode kinetics also have been established.