A real-time fluorescent sensor specific to Mg2+: crystallographic evidence, DFT calculation and its use for quantitative determination of magnesium in drinking water. Issue 6 (27th November 2014)

• Record Type: Journal Article
• Authors: Men, Guangwen; Chen, Chunrong; Zhang, Shitong; Liang, Chunshuang; Wang, Ying; Deng, Mengyu; Shang, Hongxing; Yang, Bing; Jiang, Shimei
• Is Part Of: Dalton transactions. Volume 44:Issue 6(2015)
• Page Start: 2755
• Page End: 2762
• Publication Date: 2014-11-27
• Subjects: Chemistry, Inorganic -- Periodicals; Chemistry, Physical and theoretical -- Periodicals; Chemistry, Inorganic -- Periodicals; 546.05
• DOI: 10.1039/c4dt03068k
• Languages: English
• ISSNs: 1477-9226

Abstract

Abstract : An "off-the-shelf" fluorescence "turn-on" Mg 2+ chemosensorBCSA has been developed for real-time quantitative monitoring 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 : 1BCSA –Mg 2+ complex. The coordination ofBCSA to Mg 2+ increases its structural rigidity generating a chelation-enhanced fluorescence (CHEF) effect which was confirmed by single crystal XRD studies of theBCSA –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.