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首页> 外文期刊>Russian journal of electrochemistry >Electroswitchable binding of [Co(dipy)_3]~(3+) and [Fe(dipy)_3]~(2+) n-sulfonato(thia)calix[4]arenas
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Electroswitchable binding of [Co(dipy)_3]~(3+) and [Fe(dipy)_3]~(2+) n-sulfonato(thia)calix[4]arenas

机译:[Co(dipy)_3]〜(3+)和[Fe(dipy)_3]〜(2+)n-sulfonato(thia)calix [4] arenas的电转换结合

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摘要

The methods of cyclic voltammetry, electrolysis, and spectrophotometry were used to study electrochemical properties of (TCAS + Fe~(3+) + dipy), (CCAS + Fe~(3+) + dipy), and (CCAS + Fe~(3+) + [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 + Fe~(3+) + 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 + Fe~(3+) + 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 + Fe~(3+) upon double-electron transfer. In all systems, electric switching was accompanied by synchronous color switching.
机译:使用循环伏安法,电解法和分光光度法研究(TCAS + Fe〜(3+)+ dipy),(CCAS + Fe〜(3+)+ dipy)和(CCAS + Fe〜( 3+)+ [Co(dipy)_3]〜(3+))三元系统(其中TCAS为n-磺基硫杂杯[4]芳烃,CCAS为四羧酸酯正磺基[4]芳烃,dippy =α,α'-二吡啶基)在水溶液中。 pH值为2.5时(TCAS + Fe〜(3+)+ dipy)系统中的Fe(III)单电子还原导致铁离子从下部TCAS环向上部([Fe(dipy)_3]〜 (2+))。由于TCAS的介体([Fe(dipy)_3]〜(2 + / 3 +))氧化,因此无法进行系统的反向电化学转换。已在系统(CCAS + Fe〜(3+)+ dipy)(pH值)中揭示了Fe(III)离子从未结合态到([Fe(dipy)_3]〜(2+))的反向电转换1.7)在单电子转移时,而CCAS的上缘从一个复合离子([Co(dipy)_3]〜(3+))到另一个([Fe(dipy)_3]〜(2+)的可逆电转换)已在双电子转移系统([Co(dipy)_3]〜(3+)+ CCAS + Fe〜(3+)中得到证明。在所有系统中,电切换都伴随着同步色彩切换。

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