Investigation by Fluorescence Technique of the Quenching Effect of Co2+ and Mn2+ Transition Metals, on Naphthalene-Methyl-Beta-Cyclodextrin Host-Guest Inclusion Complex


Ay U. , SARLI S. E.

JOURNAL OF FLUORESCENCE, vol.28, no.6, pp.1371-1378, 2018 (Journal Indexed in SCI) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 28 Issue: 6
  • Publication Date: 2018
  • Doi Number: 10.1007/s10895-018-2301-9
  • Title of Journal : JOURNAL OF FLUORESCENCE
  • Page Numbers: pp.1371-1378
  • Keywords: Inclusion complex, Heavy metal ions, Fluorescence, Quenching, Methylated--cyclodextrin, Fluorescence lifetime, HEAVY-METALS

Abstract

Inclusion complex of naphthalene with methyl-beta-cyclodextrin in water has been formed. The aqueous solutions of the various amounts of Co(2+)ve Mn(2+)salts have been added to naphthalene-methyl-beta-cyclodextrin (NAP-Me--CD) inclusion complexes. Fluorescence properties of the naphthalene (NAP) compound have been utilized to observe the changes in fluorescence intensities. Stern-Volmer quenching constants and fluorescence quantum yields have been calculated. Characterization of the resulting complex by FT-IR and H-1 NMR technique has been determined. Fluorescence lifetime measurements have been made in the presence and absence of the quenching reagent and Gibbs free energy change has been calculated.