Department of Chemistry, National Institute of Technology-Tiruchirappalli, Tiruchirappalli, Tamil, Nadu - 620015, India.
J Fluoresc. 2022 Nov;32(6):2065-2076. doi: 10.1007/s10895-022-03006-0. Epub 2022 Jul 25.
We introduce a novel selenium-based compound [N-(Phenylcarbamoselenoyl) furan-2-carboxamide] for the optical and fluorimetric detection of Hg in an aqueous medium. The synthesized compound was characterized by different spectroscopic methods. The designed chemosensor FSU has shown a significant fluorescence quenching when Hg ions were added to the sensing medium. Furthermore, Hg ions provoked a 2:1 complex formation with the chemosensor FSU. It is found that the compound offers high selectivity over a variety of cations such as Co, Cr, Ni, Zn, Cu, Mg, Hg, Cd, Ca, Mn, Ga, Pb, Na, Fe and K. The detection limit was calculated as 7.35 × 10 M. Also, FSU shows appreciable binding affinity towards Hg ions with a binding constant value of 1.413 × 10 M. The ICT mechanism of mercury sensing was confirmed with spectroscopic techniques and DFT studies. Density functional theory was also implemented to investigate the structure of the Hg complex and its electronic distribution in the aqueous medium. Finally, an MEP study was also carried out to obtain detailed information about the surface characteristics of the chemosensor FSU. Effectively, we have reported a potent chemosensor for Hg in the aqueous medium.
我们介绍了一种新型基于硒的化合物[N-(苯甲脒基硒代)呋喃-2-甲酰胺]，用于在水介质中对 Hg 进行光学和荧光检测。合成的化合物通过不同的光谱方法进行了表征。所设计的化学传感器 FSU 在向传感介质中加入 Hg 离子时显示出明显的荧光猝灭。此外，Hg 离子与化学传感器 FSU 以 2:1 的比例形成配合物。结果表明，该化合物对多种阳离子（如 Co、Cr、Ni、Zn、Cu、Mg、Hg、Cd、Ca、Mn、Ga、Pb、Na、Fe 和 K）具有高选择性。检测限计算为 7.35×10^-7 M。此外，FSU 对 Hg 离子表现出相当大的结合亲和力，结合常数值为 1.413×10^-5 M。汞传感的 ICT 机制通过光谱技术和 DFT 研究得到了证实。还实施了密度泛函理论来研究在水溶液中 Hg 配合物的结构及其电子分布。最后，还进行了 MEP 研究，以获得有关化学传感器 FSU 表面特性的详细信息。总之，我们已经报道了一种在水介质中检测 Hg 的有效化学传感器。
