Fluorescent studies of salicylaldehyde and other related carbonyl compounds for the selective and sensitive detection of Zinc(II) ions in aqueous solution

Soleiman Hisaindee, Osama Zahid, Mohammed A. Meetani, John Graham

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)

Abstract

Salicylaldehyde was found to have a high selectivity for zinc ions with simultaneous enhancement of fluorescence in aqueous buffer solution at optimum pH 8.5. The stoichiometry of the complex was determined to be 1:1 with a Ka value of 3.4×10 4 M -1 at 298 K. The fluorescence of the complex is not affected by common anions and Zn 2+ binds preferentially to salicylaldehyde in the presence of alkali, alkaline earth and heavy metal cations (Hg 2+, Cd 2+, Cr 3+ and Ni 2+). This property is not observed with related phenolic compounds bearing a carbonyl group such as esters, amides, carboxylic acids and ketones.

Original languageEnglish
Pages (from-to)677-683
Number of pages7
JournalJournal of Fluorescence
Volume22
Issue number2
DOIs
Publication statusPublished - Mar 2012

Keywords

  • Fluorescence
  • Metal ions
  • Salicylaldehyde
  • Selectivity
  • Zinc

ASJC Scopus subject areas

  • Biochemistry
  • Clinical Psychology
  • Social Sciences (miscellaneous)
  • Sociology and Political Science
  • Spectroscopy
  • Clinical Biochemistry
  • Law

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