Abstract
An “off–on” rhodamine-based fluorescence probe for the selective signaling of Cr(III) has been designed by exploiting the guest-induced structure transform mechanism. This system shows a sharp Cr(III)-selective fluorescence enhancement response in 100% aqueous system under physiological pH value and possesses high selectivity against the background of environmentally and biologically relevant metal ions including Cr(VI), Al(III), Fe(III), Cd(II), Co(II), Cu(II), Ni(II), Zn(II), Mg(II), Ba(II), Pb(II), Na(I), and K(I). Under optimum conditions, the fluorescence intensity enhancement of this system is linearly proportional to Cr(III) concentration from 5.0 × 10−8 to 7.0 × 10−6 mol L−1 with a detection limit of 1.6 × 10−8 mol L−1.
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This study was supported by the NSFC (Grants 20431010, 20621091, and J0630962).
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Mao, J., He, Q. & Liu, W. An “off–on” fluorescence probe for chromium(III) ion determination in aqueous solution. Anal Bioanal Chem 396, 1197–1203 (2010). https://doi.org/10.1007/s00216-009-3161-6
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DOI: https://doi.org/10.1007/s00216-009-3161-6