Rathod Reena V, Bera Smritilekha, Maity Prasenjit, Mondal Dhananjoy
School of Chemical Sciences, Central University of Gujarat, Gandhinagar 382030, India.
Institute of Research and Development, Gujarat Forensic Sciences University, Gandhinagar, Gujarat 382007, India.
ACS Omega. 2020 Mar 4;5(10):4982-4990. doi: 10.1021/acsomega.9b03885. eCollection 2020 Mar 17.
Environmentally benign mechanochemistry-assisted high-yielding synthesis of fluorescein-phenylalaninol (FPA) conjugates as a Schiff base receptor is reported herein. This newly synthesized fluorescent probe is found to be most exciting and efficient because of its simultaneous detection and removal of mercury ions (Hg) in aqueous medium and industrial effluents through precipitate formation. The receptor successfully worked as a chemosensor in selectively sensing the Hg ion through the rapid transition from yellow to pink in the colorimetric as well as quenching of fluorescence intensity in the fluorometric assay. The removal of mercury ions was confirmed by the inductively coupled plasma analysis of the supernatant. The lower detection limit of Hg ions for the receptor FPA is 1.65 and 0.34 μM as determined through absorption and fluorescence spectroscopic methods, respectively. The high removal efficiency (∼98%) of the mercury ions is promising and could be achieved via the formation of the complex in a 1:1 stoichiometric ratio of receptor to Hg ions. Furthermore, this probe may be a practical alternative for use in a paper-based portable device for achieving on-site detection of mercury ions in solid, solution, and vapor phases.
本文报道了环境友好型机械化学辅助高产合成作为席夫碱受体的荧光素-苯丙氨醇（FPA）缀合物。这种新合成的荧光探针因其在水性介质和工业废水中通过沉淀形成同时检测和去除汞离子（Hg）而被发现是最令人兴奋和高效的。该受体在比色法中通过从黄色到粉红色的快速转变以及荧光分析法中荧光强度的猝灭，成功地作为化学传感器选择性地检测Hg离子。通过对上清液的电感耦合等离子体分析证实了汞离子的去除。通过吸收光谱法和荧光光谱法测定，受体FPA对Hg离子的检测下限分别为1.65和0.34 μM。汞离子的高去除效率（约98%）很有前景，并且可以通过以受体与Hg离子1:1化学计量比形成络合物来实现。此外，这种探针可能是用于纸质便携式设备的一种实用替代品，用于实现对固体、溶液和气相中汞离子的现场检测。
