Abstract
Two novel corrole-appended 18-crown-6 receptors differing in the binding manners and their aluminum complexes were designed and synthesized as potential fluoroionophores for recognition of physiologically important metal ions. In receptor 2, the corrole fluorophore was linked directly to the crown ether through an amide bond in an unbent manner, whereas in receptor 5, it was linked by a xanthene spacer in a face-to-face manner. Preliminary photophysical data show that Al-corrole complex 6 can serve as a chemosensor with selective fluorescent response towards K+ ions in CH3CN. The chemosensor showed high sensitivity owing to the change in its dual emission after binding with K+ ions. With complex 6 as fluoroionophore (5.0 × 10–6 M), the detection limit for the analysis of K+ ions was estimated to be 1.6 × 10–6 M in CH3CN.
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Xia, M., Sun, Xy. Selective recognition of K+ ions through change in the dual emission of a fluorescent chemosensor based on aluminum corrole-crown ether. Russ J Gen Chem 85, 2845–2852 (2015). https://doi.org/10.1134/S1070363215120348
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DOI: https://doi.org/10.1134/S1070363215120348