Cation complexing of crown ethers using fluorescence spectroscopy, part II


Erk C., Gocmen A.

TALANTA, vol.53, no.1, pp.137-140, 2000 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 53 Issue: 1
  • Publication Date: 2000
  • Doi Number: 10.1016/s0039-9140(00)00374-x
  • Title of Journal : TALANTA
  • Page Numbers: pp.137-140

Abstract

The complex formations of benzo[12]crown-4, benzo[15]crown-5 and benzo[18]crown-6 with perchlorate salts of Mg2+, Li+ and Na+ were investigated using the steady state fluorescence emission spectroscopy in acetonitrile. The complexation enhanced quenched fluorescence spectra, (CEQFS) exhibited the ion complexation role of the macrocyclic ethers and equilibrium constant, K-e of 1:1 stoichiometry were estimated. The K, were found in the order of Mg+ > Na+ > Li+ for benzo[15]crown-5 whilst Na+ > Mg+ > Li+ order was found with benzo[12]crown-4 at 298 K. (C) 2000 Elsevier Science B.V. All rights reserved.