Abstract
In this paper, a novel compound 3-(2-quinolyl)-5-ferrocenyl-isoxazole(5) with high selectivity toward Cu2+ over other heavy and transition-metal(HTM) ions was designed and synthesized in good yields. The compound not only could be used as an electrochemical probe for Cu2+ with an anodic peak shift of Fe(II)/Fe(III) redox couple, but also could be a colorimetric and fluorescent probe due to the detectable change in color by naked eyes and a significant fluorescence quenching of monomeric anthracene moiety. This highly selective sensing of Cu2+ may be attributed to the unprecedented intermolecular electron-transfer reorganization after the oxidation of the first single electron of compound 5, as indicated by electrospray ionization mass spectrometry(ESI-MS) and density functional theory(DFT) calculation results. To the best of our knowledge, this class of compounds have rarely been reported in the field of molecular sensing. It may have a potential significance for the application of the ferrocenyl-isoxazole derivative in molecular recognition.
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Supported by the National Natural Science Foundation of China(Nos.21172001, 21372008), the Natural Science Foundation of the Education Administration of Anhui Province, China(No.KJ2016A267), the Special and Excellent Research Fund of Anhui Normal University, China and the Doctoral Scientific Research Foundation of Anhui Normal University, China(No.2016XJ J110).
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Ferrocenyl-isoxazole derivative: a novel electrochemical, colorimetric and fluorescent multiple signal probe for highly selective recognition of Cu2+ ions
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Zhang, Z., He, X., Shang, Y. et al. Ferrocenyl-isoxazole derivative: a novel electrochemical, colorimetric and fluorescent multiple signal probe for highly selective recognition of Cu2+ ions. Chem. Res. Chin. Univ. 33, 31–35 (2017). https://doi.org/10.1007/s40242-017-6239-2
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DOI: https://doi.org/10.1007/s40242-017-6239-2