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Issue 15, 2016
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Crowned spiropyran fluoroionophores with a carboxyl moiety for the selective detection of lithium ions

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Abstract

The absorbance and fluorescence spectra of carboxylated spiropyrans containing methyl-1-aza-12-crown-4, methyl-1-aza-15-crown-5, methyl-1-aza-18-crown-6 moieties are compared. Characteristic changes in spectra after addition of the alkali metal salts of Li+, Na+, K+ and Cs+ were observed. Chromism induced by the binding of the metal cations was observed as an increase in absorbance and fluorescence. Of these metal cations, the Li+ ion produced the largest change in all three spiropyran systems. Reversible photoswitching of the spiropyran-metal complexes was observed on irradiation with alternating 352 nm UV and white light. This results in reversible fluorescence based sensing of lithium ions with potential for use in a biological sensor device.

Graphical abstract: Crowned spiropyran fluoroionophores with a carboxyl moiety for the selective detection of lithium ions

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Publication details

The article was received on 01 Mar 2016, accepted on 10 Mar 2016 and first published on 21 Mar 2016


Article type: Paper
DOI: 10.1039/C6OB00468G
Author version available: Download Author version (PDF)
Citation: Org. Biomol. Chem., 2016,14, 3752-3757
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    Crowned spiropyran fluoroionophores with a carboxyl moiety for the selective detection of lithium ions

    D. B. Stubing, S. Heng and A. D. Abell, Org. Biomol. Chem., 2016, 14, 3752
    DOI: 10.1039/C6OB00468G

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