title: A new fluorescent sensor for the determination of iron(III) in semi-aqueous solution.
abstract: A simple fluorescent sensor 1 has been developed for the recognition of Fe(III) in semi-aqueous solution at pH 7.0. The sensor, containing two Schiff base type receptors directly connected to naphthalene fluorophores, shows a concentration dependent decrease in emission intensity upon Fe(III) addition. The sensor was selective for Fe(III) over other metal ions and can measure Fe(III) ion concentration between 0.05 and 0.12 mM. The binding stoichiometry was established as 1:1 (host: guest) with a binding constant (Logβ) of 4.01. Furthermore, the addition of Fe(III) to a solution of 1 caused a colour change from light yellow to colourless meaning 1 is also capable of detecting Fe(III) by the naked eye.
authors: Department of Analytical Chemistry, Faculty of Sciences, University of Cadiz, Puerto Real, Cadiz, Spain.
authors: María José
authors: MJ
authors: Casanueva Marenco
authors: Colin
authors: C
authors: Fowley
authors: Barry W
authors: BW
authors: Hyland
authors: Dolores
authors: D
authors: Galindo-Riaño
authors: Suban K
authors: SK
authors: Sahoo
authors: John F
authors: JF
authors: Callan
mesh_terms: D005290:Ferric Compounds / Q000032:analysis*; D005456:Fluorescent Dyes / Q000138:chemical synthesis / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D015394:Molecular Structure; D009281:Naphthalenes / Q000737:chemistry; D012545:Schiff Bases / Q000737:chemistry; D012996:Solutions; D014867:Water / Q000737:chemistry
chemical_list: D005290:Ferric Compounds; D005456:Fluorescent Dyes; D009281:Naphthalenes; D012545:Schiff Bases; D012996:Solutions; D014867:Water