• P-ISSN1225-0163
  • E-ISSN2288-8985
  • SCOPUS, ESCI, KCI

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  • P-ISSN 1225-0163
  • E-ISSN 2288-8985

Electrochemical Properties and Synthesis of Poly(ether)tailed Cobalt(II)bipyridine Complex

Analytical Science and Technology / Analytical Science and Technology, (P)1225-0163; (E)2288-8985
1996, v.9 no.3, pp.292-301
Kim, II Kwang
Jun, II Chul
Murray, Royce W.
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Abstract

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>).

keywords
Diffusion coefficient, heterogeneous electron transfer rate constant, microelectrode, poly(ether)tailed bipyridine complex


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