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• W2074415612 startingPage "5742" @default.
• W2074415612 abstract "Abstract The synthesis, electrochemical, and optical properties of a new [3.3]ferrocenophane framework in which two ferrocene subunits, with similar electronic environments, are linked through two substituted guanidine moieties, are reported. The receptors 4 – 7 have been prepared in good yields by the reaction of bis(carbodiimide) 3 with primary amines. This architecture is exceptionally “tunable” because a variety of “legs” may be appended to the basic [3.3]ferrocenophane scaffold to give a wide range of signaling units. These receptors show remarkable ion‐sensing properties, due to the presence of a redox active unit (ferrocene), and an amphoteric binding site (guanidine). In this nitrogen‐rich structural motif the guanidine bridges act as multipoint binding sites for anions, cations, and amino acids. Sensing of anions takes place both by unprecedented redox‐ratiometric measurements (F − , Cl − , AcO − , NO 3 − , HSO 4 − , H 2 PO 4 − , and HP 2 O 7 3− ), and colorimetric change (F − , AcO − , H 2 PO 4 − , and HP 2 O 7 3− ). Sensing and discrimination of amino acids takes place by redox‐ratiometric measurements, whereas the recognition of metal cations (Zn 2+ , Ni 2+ , and Cd 2+ ) is achieved either by electrochemical or fluorescence measurements. Moreover, the reported receptors display splitting of the oxidation wave of the Fe II /Fe III redox couple, and form the mixed‐valence species 4 +. ‐ 7 +. by electrochemical partial oxidation which, interestingly, show intervalence charge‐transfer transitions associated to the appearance of absorption bands in the near infrared spectral region." @default.
• W2074415612 created "2016-06-24" @default.
• W2074415612 creator A5024637242 @default.
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• W2074415612 creator A5055925650 @default.
• W2074415612 creator A5060423313 @default.
• W2074415612 creator A5084410215 @default.
• W2074415612 date "2007-06-25" @default.
• W2074415612 modified "2023-10-17" @default.
• W2074415612 title "[3.3]Ferrocenophanes with Guanidine Bridging Units as Multisignalling Receptor Molecules for Selective Recognition of Anions, Cations, and Amino Acids" @default.
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• W2074415612 doi "https://doi.org/10.1002/chem.200601757" @default.
• W2074415612 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/17444547" @default.
• W2074415612 hasPublicationYear "2007" @default.
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