title: A real-time fluorescent sensor specific to Mg2+: crystallographic evidence, DFT calculation and its use for quantitative determination of magnesium in drinking water.
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.
authors.affiliation: State Key Laboratory of Supramolecular Structure and Materials, Jilin University, 2699 Qianjin Avenue, Changchun, 130012, P. R. China. smjiang@jlu.edu.cn.
authors.forename: Guangwen
authors.initials: G
authors.lastname: Men
authors.forename: Chunrong
authors.initials: C
authors.lastname: Chen
authors.forename: Shitong
authors.initials: S
authors.lastname: Zhang
authors.forename: Chunshuang
authors.initials: C
authors.lastname: Liang
authors.forename: Ying
authors.initials: Y
authors.lastname: Wang
authors.forename: Mengyu
authors.initials: M
authors.lastname: Deng
authors.forename: Hongxing
authors.initials: H
authors.lastname: Shang
authors.forename: Bing
authors.initials: B
authors.lastname: Yang
authors.forename: Shimei
authors.initials: S
authors.lastname: Jiang
mesh_terms: D018360:Crystallography, X-Ray; D060766:Drinking Water / Q000737:chemistry*; D005456:Fluorescent Dyes / Q000737:chemistry*; D008274:Magnesium / Q000032:analysis*; D008958:Models, Molecular; D011789:Quantum Theory; D013997:Time Factors
chemical_list: D060766:Drinking Water; D005456:Fluorescent Dyes; D008274:Magnesium