Abstract
Ferrocene containing N-tosyl hydrazones as selective and sensitive optical and electrochemical chemosensors were synthesized and characterized by 1H NMR, 13C NMR, ESI-MS and X-ray analysis. The cation and anion binding studies were carried out using various techniques including electrochemistry, UV–vis and 1H NMR spectroscopy. Chemosensors 2a and 2b have shown excellent selective recognition toward Hg2+, Cu2+ and F− through optical and electrochemical signals. The color of 2a and 2b in solution changed visibly from pale yellow to red upon addition of Hg2+ion, while the color of solution changed from pale yellow to yellow green upon addition of Cu2+, which can be easily detected by the naked eye.
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