title: A Single Fluorescent Sensor for Hg(2+) and Discriminately Detection of Cr(3+) and Cr(VI).
abstract: An iminocrown ether was synthesized and its fluorescence properties were studied in the presence of a variety of cations and anions in 99 % aqueous medium. The results revealed the interesting ability of the iminocrown ether in discriminately detection of Cr(III) and Cr(VI) ions in addition to detection of Hg(2+) ion. Among various environmentally relevant metal ions, Cr(3+) and Hg(2+) enhanced and quenched the fluorescence emission, respectively and among anions only dichromate ion, Cr(VI), quenched the emission while the rest of ions insignificantly influenced the fluorescence emission. Selectivity of the iminocrown ether was also investigated and proved in the presence of excess of common competing ions. Furthermore, the fluorescence intensity of the iminocrown ether was studied as a function of concentrations of the three ions by performing a titration experiment for each one of them. The detection limits of 5.36 × 10(-8), 2.06 × 10(-6), and 7.49 × 10(-8) mol L(-1) were also calculated for Hg(2+), Cr(3+), and Cr(VI), respectively.
authors.affiliation: School of Chemistry, College of Science, University of Tehran, Tehran, Iran.
authors.forename: Jafar
authors.initials: J
authors.lastname: Afshani
authors.affiliation: School of Chemistry, College of Science, University of Tehran, Tehran, Iran. abadiei@khayam.ut.ac.ir.|Nanobiomedicine Center of Excellence, Nanoscience and Nanotechnology Research Center, University of Tehran, Tehran, Iran. abadiei@khayam.ut.ac.ir.
authors.forename: Alireza
authors.initials: A
authors.lastname: Badiei
authors.affiliation: School of Chemistry, College of Science, University of Tehran, Tehran, Iran.
authors.forename: Mehdi
authors.initials: M
authors.lastname: Karimi
authors.affiliation: School of Chemistry, College of Science, University of Tehran, Tehran, Iran.
authors.forename: Negar
authors.initials: N
authors.lastname: Lashgari
authors.affiliation: Department of Chemistry, Faculty of Science, Alzahra University, Tehran, Iran.
authors.forename: Ghodsi Mohammadi
authors.initials: GM
authors.lastname: Ziarani
mesh_terms: D001372:Aza Compounds / Q000138:chemical synthesis / Q000737:chemistry*; D002857:Chromium / Q000032:analysis* / Q000737:chemistry*; D005456:Fluorescent Dyes / Q000032:analysis / Q000138:chemical synthesis / Q000737:chemistry*; D006571:Heterocyclic Compounds / Q000138:chemical synthesis / Q000737:chemistry*; D008628:Mercury / Q000032:analysis*; D015394:Molecular Structure
chemical_list: C000611346:3,4-9,10-13,14-tribenzo-1,12-diaza-5,8-dioxacyclotetradecane-1,11-diene; D001372:Aza Compounds; D005456:Fluorescent Dyes; D006571:Heterocyclic Compounds; D002857:Chromium; D008628:Mercury
keywords: Chromium; Fluorescent sensor; Iminocrown ether; Mercury