Electroswitchable binding of [Co(dipy)3]3+ and [Fe(dipy)3]2+n-sulfonato(thia)calix[4]arenas

被引：0
作者：
V. V. Yanilkin
A. S. Stepanov
N. V. Nastapova
A. R. Mustafina
V. A. Burilov
S. E. Solov’eva
I. S. Antipin
A. I. Konovalov
机构：
[1] Kazan Scientific Center of the Russian Academy of Sciences,Arbuzov Institute of Organic and Physical Chemistry
来源：
Russian Journal of Electrochemistry | 2010年 / 46卷
关键词：
-sulfonato(thia)calix[4]arene; [Co(dipy); ]; and Fe; ions; complex; electrochemical reduction; electroswitchable binding;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
The methods of cyclic voltammetry, electrolysis, and spectrophotometry were used to study electrochemical properties of (TCAS + Fe3+ + dipy), (CCAS + Fe3+ + dipy), and (CCAS + Fe3+ + [Co(dipy)3]3+) triple systems (where TCAS is n-sulfonatothiacalix[4]arene, CCAS is tetracarboxylate n-sulfonatocalix[4]arene, and dipy = α,α′-dipyridyl) in an aqueous solution. One-electron reduction of Fe(III) in the (TCAS + Fe3+ + dipy) system at pH 2.5 results in electroswitching of iron ions from the lower TCAS ring to the upper ([Fe(dipy)3]2+). Reverse electrochemical switching of the system is impossible due to mediator ([Fe(dipy)3]2+/3+) oxidation of TCAS. Reverse electroswitching of Fe(III) ions from unbound to bound state as ([Fe(dipy)3]2+) with CCAS has been revealed in the system (CCAS + Fe3+ + dipy) (pH 1.7) upon single-electron transfer, whereas reversible electroswitching by the upper rim of CCAS from one complex ion ([Co(dipy)3]3+) to another ([Fe(dipy)3]2+) has been demonstrated in the system ([Co(dipy)3]3+ + CCAS + Fe3+ upon double-electron transfer. In all systems, electric switching was accompanied by synchronous color switching.
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页码：1263 / 1279
页数：16
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