Selective detection of Hg2+ ion in aqueous medium with the use of 3‐(pyrimidin‐2‐ylimino)indolin‐2‐one‐functionalized SBA‐15 |
| |
| Authors: | Negar Lashgari Alireza Badiei Ghodsi Mohammadi Ziarani |
| |
| Institution: | 1. School of Chemistry, College of Science, University of Tehran, Tehran, Iran;2. Nanobiomedicine Center of Excellence, Nanoscience and Nanotechnology Research Center, University of Tehran, Tehran, Iran;3. Department of Chemistry, Alzahra University, Tehran, Iran |
| |
| Abstract: | An isatin‐based fluorophore, 3‐(pyrimidin‐2‐ylimino)indolin‐2‐one, was grafted on a large‐pore mesoporous silica material (SBA‐15) via a two‐step modification process. The obtained material (SBA‐Is‐Py) was characterized using various techniques and the characterization showed that the ordered porous structure was preserved after the post‐grafting procedure. The optical sensing ability of SBA‐Is‐Py was studied upon the addition of a variety of metal ions and a marked fluorescence quenching by Hg2+ ion was observed. SBA‐Is‐Py exhibited excellent Hg2+‐specific luminescence quenching over various competing cations. Furthermore, linear changes of the optical properties of SBA‐Is‐Py as a function of the concentrations of Hg2+ ion were found, with a calculated detection limit of 3.28 × 10?7 M. In addition, SBA‐Is‐Py was successfully employed for the determination of Hg2+ in real water samples. |
| |
| Keywords: | fluorescent sensor functionalized SBA‐15 Hg2+ ion isatin mesoporous material |
|
|
