폴리(에테르)사슬이 결합된 Cobalt(II)bipyridine 착물의 합성과 전기화학적 성질
Electrochemical Properties and Synthesis of Poly(ether)tailed Cobalt(II)bipyridine Complex
분석과학 / Analytical Science and Technology, (P)1225-0163; (E)2288-8985
1996, v.9 no.3, pp.292-301
김일광
전일철
Royce W. Murray
김일광,
전일철,
&
Murray,
R.
W.
(1996). 폴리(에테르)사슬이 결합된 Cobalt(II)bipyridine 착물의 합성과 전기화학적 성질. , 9(3), 292-301.
초록
산화환원반응 탐침제로, poly ether 꼬리가 결합된 Cobalt(II)bipyridine 착물을 합성 하였고, 이들 화합물의 느린 확산계수와 불균일 전자이동을 설명하였다. $Co(bpy(ppgm)_2)_{3^-}(ClO_4)_2$에 전해질 $LiClO_4$가 혼합된 neat 상태의 산화반응에 대한 확산계수는 $1.5{\times}10^{-15}cm^2/s$ 였다. 이 화합물들의 불균일 전자이동 속도상수들은 확산계수와 관련이 있었다. 확산계수의 감소에 따라 속도상수(k)의 감소가 일어났다. 강한 이온쌍을 형성하는 $ClO{_4}^-$의 화합물은 약한 이온 쌍을 형성하는 $CF_3COO^-$ 화합물보다 확산계수가 훨씬 작았다.
- keywords
-
Diffusion coefficient,
heterogeneous electron transfer rate constant,
microelectrode,
poly(ether)tailed bipyridine complex
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 $1.5{\times}10^{-15}cm^2/s$ have been observed for the oxidation of neat $Co(bpy(ppgm)_2)_{3^-}(ClO_4)_2$ with $LiClO_4$ 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($ClO{_4}^-$) was much smaller than the diffusion coefficient for compound of weak ion pairing anion($CF_3COO^-$).
- keywords
-
Diffusion coefficient,
heterogeneous electron transfer rate constant,
microelectrode,
poly(ether)tailed bipyridine complex