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Issue 6, 2015
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A real-time fluorescent sensor specific to Mg2+: crystallographic evidence, DFT calculation and its use for quantitative determination of magnesium in drinking water

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Abstract

An “off-the-shelf” fluorescence “turn-on” Mg2+ chemosensor 3,5-dichlorosalicylaldehyde (BCSA) was rationally designed and developed. This proposed sensor works based on Mg2+-induced formation of the 2 : 1 BCSA–Mg2+ complex. The coordination of BCSA to Mg2+ increases its structural rigidity generating a chelation-enhanced fluorescence (CHEF) effect which was confirmed by single crystal XRD studies of the BCSA–Mg2+ complex and TD/DFT calculations. This sensor exhibits high sensitivity and selectivity for the quantitative monitoring of Mg2+ with a wide detection range (0–40 μM), a low detection limit (2.89 × 10−7 mol L−1) and a short response time (<0.5 s). It can also resist the interference from the other co-existing metal ions, especially Ca2+. Consequently, this fluorescent sensor can be utilized to monitor Mg2+ in real time within actual samples from drinking water.

Graphical abstract: A real-time fluorescent sensor specific to Mg2+: crystallographic evidence, DFT calculation and its use for quantitative determination of magnesium in drinking water

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Supplementary files

Article information


Submitted
05 Oct 2014
Accepted
06 Nov 2014
First published
07 Nov 2014

Dalton Trans., 2015,44, 2755-2762
Article type
Paper
Author version available

A real-time fluorescent sensor specific to Mg2+: crystallographic evidence, DFT calculation and its use for quantitative determination of magnesium in drinking water

G. Men, C. Chen, S. Zhang, C. Liang, Y. Wang, M. Deng, H. Shang, B. Yang and S. Jiang, Dalton Trans., 2015, 44, 2755
DOI: 10.1039/C4DT03068K

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