A novel asymmetrical squarylium-dye-based dual signaling probe was synthesized and found to exhibit colorimetric and fluorescent properties on selective binding towards Fe3+ in ethanol/water (4:1, v/v) solution. The binding constant was determined to be 7.69 × 102 M–1, and the detection limit of SQ was 9.158 × 10–6 M. Most importantly, the 1:2 stoichiometry of the host-guest complexation was confirmed by Job’s method. Moreover, the high sensing ability of the receptor towards Fe3+ was also investigated by the electrochemical technique.
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Published in Zhurnal Prikladnoi Spektroskopii, Vol. 85, No. 2, pp. 327–334, March–April, 2018.
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Lu, M., Wang, Y., Li, Y. et al. A Colorimetric and Fluorescent Chemosensor of Fe3+ Based on an Asymmetrical Squarylium Dye. J Appl Spectrosc 85, 341–348 (2018). https://doi.org/10.1007/s10812-018-0654-0
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DOI: https://doi.org/10.1007/s10812-018-0654-0