- P-ISSN 1225-0163
- E-ISSN 2288-8985
The synthesis of poly(ether)tailed bipyridine complex as redox reaction probes has advanced attempts to interpret very slow diffusion and heterogeneous electron transfer. Diffusion coefficients as low as <TEX>$1.5{\times}10^{-15}cm^2/s$</TEX> have been observed for the oxidation of neat <TEX>$Co(bpy(ppgm)_2)_{3^-}(ClO_4)_2$</TEX> with <TEX>$LiClO_4$</TEX> electrolyte. Heterogeneous electron transfer rate constants of materials were found to vary with diffusion coefficient. The decrease in k as the diffusion coefficient decreases was actually caused by the decreasing D. Diffusion coefficient for compound of strong ion pairing anion(<TEX>$ClO{_4}^-$</TEX>) was much smaller than the diffusion coefficient for compound of weak ion pairing anion(<TEX>$CF_3COO^-$</TEX>).