Investigations into the inhibition of luminol chemiluminescence by some novel metal complexes

Ayşegül Gölcü*, R. Alan Wheatley, Havva Demirelli, Mehmet Tümer, Mustafa Dolaz

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

In this study, we prepared two different type complex groups. One of them is based on Schiff base (A1, A2 and A3) Cd(II) complexes, another one is β-blockers (acebutolol (ACE), atenolol (ATE) and propranolol (PRO)) Cu(II) complexes. The ligands and their metal complexes were characterized by elemental analyses, mass spectra, 1H(13C) NMR spectra, FT-IR, UV-vis, conductivity measurements and thermal analysis studies. Protonation constants of the ligands and stability constants of their complexes were determined by potentiometric titration method at 25.00±0.02 °C under nitrogen atmosphere and ionic strength of 0.10 M sodium perchlorate. For the Schiff bases, the solvent was 50% DMSO-water; for the β-blockers, it was 50% methanol-water media. The effects of these properties on the observed inhibition of chemiluminescence and the analytical implications of the results are also discussed. Two sets of novel coordination compounds were found to inhibit the intense chemiluminescence reaction in DMSO solution between luminol and dioxygen in the presence of a strong base.

Original languageEnglish
Pages (from-to)144-153
Number of pages10
JournalCurrent Analytical Chemistry
Volume6
Issue number2
DOIs
Publication statusPublished - 2010
Externally publishedYes

Keywords

  • Complexes
  • Luminol chemiluminescence
  • Potentiometric studies
  • Schiff base ligands
  • ß-blockers
  • Stability constants

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