Men Guangwen, Chen Chunrong, Zhang Shitong, Liang Chunshuang, Wang Ying, Deng Mengyu, Shang Hongxing, Yang Bing, Jiang Shimei
State Key Laboratory of Supramolecular Structure and Materials, Jilin University, 2699 Qianjin Avenue, Changchun, 130012, P. R. China.
Dalton Trans. 2015 Feb 14;44(6):2755-62. doi: 10.1039/c4dt03068k.
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.
一种“现成的”荧光“开启”型镁离子化学传感器3,5-二氯水杨醛（BCSA）被合理设计并开发出来。该传感器基于镁离子诱导形成2:1的BCSA - 镁离子配合物而工作。BCSA与镁离子的配位增加了其结构刚性，产生螯合增强荧光（CHEF）效应，这通过BCSA - 镁离子配合物的单晶XRD研究和TD/DFT计算得到证实。该传感器对镁离子的定量监测具有高灵敏度和选择性，检测范围宽（0 - 40 μM），检测限低（2.89×10⁻⁷ mol L⁻¹）且响应时间短（<0.5 s）。它还能抵抗其他共存金属离子的干扰，尤其是钙离子。因此，这种荧光传感器可用于实时监测饮用水等实际样品中的镁离子。
