A new fluorescent sensor for the determination of iron(III) in semi-aqueous solution

María José Casanueva Marenco, Colin Fowley, Barry W. Hyland, Dolores Galindo-Riaño, Suban K. Sahoo, John F. Callan

Research output: Contribution to journalArticlepeer-review

26 Citations (Scopus)

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.

Original languageEnglish
Pages (from-to)795-798
Number of pages4
JournalJournal of Fluorescence
Volume22
Issue number3
DOIs
Publication statusPublished - May 2012
Externally publishedYes

Keywords

  • Fluorescence
  • Iron(III)
  • Schiff base
  • Sensor

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