Fluorescent ratioable recognition of Cu 2+ in water using a pyrene-attached macrocycle/γ-cyclodextrin complex

Ronghua Yang, Ying Zhang, Ke'An Li, Feng Liu, Wing Hong CHAN

Research output: Contribution to journalArticlepeer-review

28 Citations (Scopus)

Abstract

A pyrene-functional fluoroionophore, 1 was used to construct a supramolecular 1/γ-CD complex for Cu 2+ recognition in water. In aqueous γ-CD solution, 1 exhibits pyrene monomer fluorescence emission at 378 nm and 397 nm, while in the presence of Cu 2+, it shows a pyrene excimer emission at 452 nm with a decrease in the monomer fluorescence due to the formation of a 1:2 metal-liganded complex. Based on the response characteristics of the supramolecular complex, a fluorescent ratiometric method was performed for the determination of Cu 2+ concentration in water. With the optimum conditions described, Cu 2+ in aqueous solution can be determined from 1.2 × 10 -6 to 4.5 × 10 -4 M. The Cu 2+ selectivity of the complex is excellent, and the excimer fluorescence enhancements are very smaller induced by other heavy metal and transition metal ions.

Original languageEnglish
Pages (from-to)97-103
Number of pages7
JournalAnalytica Chimica Acta
Volume525
Issue number1
DOIs
Publication statusPublished - 1 Nov 2004

Scopus Subject Areas

  • Analytical Chemistry
  • Biochemistry
  • Environmental Chemistry
  • Spectroscopy

User-Defined Keywords

  • Fluorescence
  • Metal ion
  • Molecular recognition
  • Ratiometry

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