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Abstract: A series of ferrocene- and azobenzene-based compounds with acyl amine groups attached were designed and synthesized to explore their potential application in anion recognition. Their electro- and photo-properties, and the effect of nitro and amine substituents of the benzene ring on anion recognition were studied by UV-vis absorption spectroscopy (UV) and cyclic voltammetry (CV). The results showed that a nitro group substituent has a positive effect on the binding affinity and sensitivity, which might be due to the strong hydrogen bonding interaction between the receptor and the guest, while an amino group substituent has a negative effect on the sensitivity. Furthermore, the shift in the UV-vis absorption spectra was observed as a color change, which can be used for the naked-eye detection of F⁻ and H₂PO₄⁻.

This paper describes the design, preparation and anion recognition property study of three ferrocene and azobenzene based compounds. While the synthesis is simple and straightforward, the resulting compounds showed promising and interesting selective recognition of anions. I think this article nicely describes the design and synthesis of ferrocene chromophore system and evaluate the products as potential ion detectors. I thought the synthesis was presented in a fashion that is not in the traditional synthetic experimental style where the produce for all new compounds are presented followed by a list of the spectral data (e.g., Rf, mp, IR, 1H NMR, 13CNMR and HRMS) for new all new compounds.

用于阴离子识别的二茂铁基偶氮苯化合物的合成

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