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Selective detection of Hg 2+ ion in aqueous medium with the use of 3‐(pyrimidin‐2‐ylimino)indolin‐2‐one‐functionalized SBA‐15
Author(s) -
Lashgari Negar,
Badiei Alireza,
Mohammadi Ziarani Ghodsi
Publication year - 2018
Publication title -
applied organometallic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.53
H-Index - 71
eISSN - 1099-0739
pISSN - 0268-2605
DOI - 10.1002/aoc.3991
Subject(s) - chemistry , detection limit , fluorophore , isatin , luminescence , fluorescence , metal ions in aqueous solution , mesoporous silica , ion , quenching (fluorescence) , aqueous solution , nuclear chemistry , mesoporous material , analytical chemistry (journal) , chromatography , organic chemistry , catalysis , physics , optoelectronics , quantum mechanics
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 Hg 2+ ion was observed. SBA‐Is‐Py exhibited excellent Hg 2+ ‐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 Hg 2+ 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 Hg 2+ in real water samples.