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

被引:3
作者
Yanilkin, V. V. [1 ]
Stepanov, A. S. [1 ]
Nastapova, N. V. [1 ]
Mustafina, A. R. [1 ]
Burilov, V. A. [1 ]
Solov'eva, S. E. [1 ]
Antipin, I. S. [1 ]
Konovalov, A. I. [1 ]
机构
[1] Russian Acad Sci, Kazan Sci Ctr, AE Arbuzov Organ & Phys Chem Inst, Kazan 420088, Russia
基金
俄罗斯基础研究基金会;
关键词
n-sulfonato(thia)calix[4]arene; Co(dipy)(3)](3+) and Fe3+ ions; complex; electrochemical reduction; electroswitchable binding; TRANSITION-METAL-COMPLEXES; ELECTROCHEMICAL PROPERTIES; MOLECULAR RECOGNITION; ELECTRON-TRANSFER; REDOX; PSEUDOROTAXANES; RECEPTORS; STATE; DERIVATIVES; CATENANES;
D O I
10.1134/S1023193510110078
中图分类号
O646 [电化学、电解、磁化学];
学科分类号
081704 ;
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 = alpha,alpha'-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.
引用
收藏
页码:1263 / 1279
页数:17
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