Effect of Heavy Metals on Dynamic and Static Quenching of the Fluorescence of the Host-Guest Inclusion Complex Methyl-beta-Cyclodextrin by 2,9-Dimethyl-4,7-Diphenyl-1,10-Phenanthroline in Aqueous Media


JOURNAL OF APPLIED SPECTROSCOPY, vol.88, no.4, pp.838-846, 2021 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 88 Issue: 4
  • Publication Date: 2021
  • Doi Number: 10.1007/s10812-021-01248-7
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Chemical Abstracts Core, INSPEC
  • Page Numbers: pp.838-846
  • Keywords: inclusion complex, transition metals, quenching mechanism, fluorescence lifetime, bathocuproine, CARBON-TETRACHLORIDE, ANILINE, DIFFUSION, DISSOLUTION, COUMARIN, WATER
  • Kocaeli University Affiliated: Yes


An inclusion complex was formed with methyl-beta-cyclodextrin (Me-beta-CD) and the smallest unit of the macrocyclic family of bathocuproine, 2,9-dimethyl-4,7-diphenyl-1,10-phenanthroline. With this newly formed fluorescent probe, the quenching effect of heavy metals was investigated. Spectral characterization of the complex was performed by UV-visible and fluorescence spectroscopy techniques. The complex formation constant (K-b), Gibbs free energy (Delta G(0)), and approximate quenching activation energy (E-a) values were calculated. Lifetime (tau), bimolecular quenching rate constant (k(q)) values, and diffusion rate constant (k(d)) calculations were made, and the mechanism of quenching by the effect of heavy metals was clarified.