Unprecedented 1,3-Diaza[3]ferrocenophane Scaffold as Molecular Probe for Anions

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• 作者：Antonia Sola ; Rau虂l A. Orenes ; Mari虂a A虂ngeles Garci虂a ; Rosa M. Claramunt ; Ibon Alkorta ; Jose虂 Elguero ; Alberto Ta虂rraga ; Pedro Molina
• 刊名：Inorganic Chemistry
• 出版年：2011
• 出版时间：May 2, 2011
• 年：2011
• 卷：50
• 期：9
• 页码：4212-4220
• 全文大小：1004K
• 年卷期：v.50,no.9(May 2, 2011)
• ISSN：1520-510X

文摘

The guanidine unit in the guise of 2-aminoimidazole in the new structural motif 2-arylamino-1,3-diaza[3]ferrocenophane 4 acts as a binding site for anions. The electrochemical behavior of this compound has been studied by cyclic voltammetry (CV) and differential pulse voltammetry (DPV) and was found to exhibit a quasi reversible oxidation peak, associated to the Fe(II)/Fe(III) redox couple (Ep = 440 mV), and a non-reversible oxidation wave (Ep = 817 mV), probably associated to the oxidation of the C鈺怤 unit present in the guanidine bridge. Recognition of AcO^{鈭?/sup>, PhCO₂鈭?/sup>, F鈭?/sup>, Cl鈭?/sup>, and Br鈭?/sup> anions by the free receptor and the less basic anions Br鈭?/sup>, Cl鈭?/sup>, and NO₃鈭?/sup> by its monoprotonated form takes place by unusual redox-ratiometric measurements and spectroscopic (1H NMR and UV鈭抳is) changes.}