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- Title
Selective detection of Hg<sup>2+</sup> ion in aqueous medium with the use of 3-(pyrimidin-2-ylimino)indolin-2-one-functionalized SBA-15.
- Authors
Lashgari, Negar; Badiei, Alireza; Mohammadi Ziarani, Ghodsi
- 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.
- Subjects
FLUOROPHORES; INDOLINE; SILICA; METAL ions; LUMINESCENCE
- Publication
Applied Organometallic Chemistry, 2018, Vol 32, Issue 1, pn/a
- ISSN
0268-2605
- Publication type
Article
- DOI
10.1002/aoc.3991