Electron Transfer Reaction between Δ2,2'-Bi-1,3-dithiole (TTF) and 7,7,8,8-Tetracyanoquinodimethane (TCNQ). Electron Donating Property of TTF

Article abstract of DOI:10.1246/bcsj.53.1340

The reaction between Δ^2.2'-bi-1,3-dithiole (TTF) and 7,7,8,8-tetracyanoquinodimethane (TCNQ) in acetonitrile solution, TTF + TCNQ = TTF ^+. =TCNQ ^-., was analyzed spectrophotometrically.The thermodynamical data of chemical equilibrium were determined to be K=(2.8 +/- 0.1)*10^-3 at 11 deg C, ΔH=-6.7 +/-1.3 kJ mol ^-1 and Σ=-72.8 +/- 17 JK^-1mol^-1.The reaction-rate study of the equilibrium in several solvents was also made by temperature-jump technique.The difference in the electron-donating properties between TTF and N,N,N',N'-tetramethyl-p-phenylenediamine (TMPD) is discussed by comparing the results with those of the reaction between TMPD and TCNQ.