A Novel Fluorescent Chemosensor Assembled with 2,6-Bis(2-Benzimidazolyl)Pyridine-Functionalized Nanoporous Silica-Type SBA-15 for Recognition of Hg2+ Ion in Aqueous Media

A novel fluorescent sensor for the recognition of Hg 2+ in aqueous media was developed by assembly of 2,6-bis(2-benzimidazolyl) pyridine to SBA-15 nanoporous silica. The synthesized materials were characterized by techniques such as XRD, FT-IR, N 2 adsorption–desorption, and TGA. Investigation of fl...

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Bibliographic Details
Published in:International Journal of Environmental Research 2018-03, Vol.12 (1), p.109-115
Main Authors: Badiei, Alireza, Razavi, Bita Vosough, Goldooz, Hassan, Mohammadi Ziarani, Ghodsi, Faridbod, Farnoush, Ganjali, Mohammad Reza
Format: Article
Language:English
Subjects:
Cations
Chemical sensors
Chemoreceptors
Earth and Environmental Science
Emission analysis
Emission spectra
Environment
Environmental Engineering/Biotechnology
Environmental Management
Fluorescence
Geoecology/Natural Processes
Landscape/Regional and Urban Planning
Mercury
Mercury (metal)
Natural Hazards
Pyridines
Recognition
Research Paper
Silica
Silicon dioxide
Titration
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Summary:A novel fluorescent sensor for the recognition of Hg 2+ in aqueous media was developed by assembly of 2,6-bis(2-benzimidazolyl) pyridine to SBA-15 nanoporous silica. The synthesized materials were characterized by techniques such as XRD, FT-IR, N 2 adsorption–desorption, and TGA. Investigation of fluorescence properties of prepared material revealed emission spectra having maxima at 396 nm following excitation at 353 nm. It was found that the fluorescence intensity of the SBA-15 functionalized material remarkably quenched in the presence of Hg 2+ ions in the pH range of 6–8, showing high selectively toward mercury ion among the more common tested cations. The fluorescence titration studies confirmed the linear relation between the concentration of Hg 2+ ion and the fluorescence intensity quenching, and the lowest detection limit was calculated as 2.6 × 10 −6 M.
ISSN:1735-6865
2008-2304
DOI:10.1007/s41742-018-0075-1