1, 3, 4-Thiadiazol derivative functionalized-Fe3O4@SiO2 nanocomposites as a fluorescent probe for detection of Hg2+ in water samples. Issue 39 (13th June 2018)

• Record Type: Journal Article
• Authors: Mir, Noshin; Jalilian, Sara; Karimi, Pouya; Nejati-Yazdinejad, Massoud; Khammarnia, Somaye
• Is Part Of: RSC advances. Volume 8:Issue 39(2018)
• Page Start: 21745
• Page End: 21753
• Publication Date: 2018-06-13
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/c8ra03448f
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : VBYT-Fe3 O4 @SiO2 fluorescent probe was designed for sensitive detection of mercury in water samples. Abstract : 5-Amino-1, 3, 4-thiadiazole-2-thiol was used to synthesize a novel fluorescent functionalizing group on a Fe3 O4 @SiO2 magnetic nanocomposite surface for detection of heavy metal ions in water samples. The prepared probe was characterized by using X-ray diffraction, transmission electron microscopy, Fourier transform infrared spectroscopy, and a vibrating sample magnetometer. Among various tested ions, the new nanocomposite responded to Hg 2+ ions with an intense fluorescence "turn-off". The limit of detection of the probe shows that it is sensitive to the minimum Hg 2+ concentration of 48.7 nM. Theoretical calculations were done for estimating binding energies of the three possible bonding modes and the visualized molecular orbitals were presented.