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Updated: Apr 20, 2026
In Situ Measurement of Vacuum Window Birefringence using 25Mg+ Fluorescence
Published on: June 13, 2020
A real-time fluorescent sensor specific to Mg2+: crystallographic evidence, DFT calculation and its use for
Guangwen Men1, Chunrong Chen, Shitong Zhang
1State Key Laboratory of Supramolecular Structure and Materials, Jilin University, 2699 Qianjin Avenue, Changchun, 130012, P. R. China. smjiang@jlu.edu.cn.
Abstract:
An "off-the-shelf" fluorescence "turn-on" Mg(2+) chemosensor 3,5-dichlorosalicylaldehyde (BCSA) was rationally designed and developed. This proposed sensor works based on Mg(2+)-induced formation of the 2 : 1 BCSA-Mg(2+) complex. The coordination of BSCA to Mg(2+) increases its structural rigidity generating a chelation-enhanced fluorescence (CHEF) effect which was confirmed by single crystal XRD studies of the BSCA-Mg(2+) complex and TD/DFT calculations. This sensor exhibits high sensitivity and selectivity for the quantitative monitoring of Mg(2+) 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 Ca(2+). Consequently, this fluorescent sensor can be utilized to monitor Mg(2+) in real time within actual samples from drinking water.
