OSA's Digital Library

Virtual Journal for Biomedical Optics

Virtual Journal for Biomedical Optics

| EXPLORING THE INTERFACE OF LIGHT AND BIOMEDICINE

  • Editor: Gregory W. Faris
  • Vol. 5, Iss. 12 — Sep. 30, 2010

Complexation of Europium(III) with the Zwitterionic Form of Amino Acids Studied with Ultraviolet–Visible and Time-Resolved Laser-Induced Fluorescence Spectroscopy

Anne Heller, Olivia Rönitz, Astrid Barkleit, Gert Bernhard, and Jörg-Uwe Ackermann

Applied Spectroscopy, Vol. 64, Issue 8, pp. 930-935 (2010)


View Full Text Article

Acrobat PDF (307 KB)





Browse Journals / Lookup Meetings

Browse by Journal and Year


   


Lookup Conference Papers

Close Browse Journals / Lookup Meetings

Article Tools

Share
Citations
  • Export Citation/Save Click for help

Abstract

The complex formation of europium(III) with the zwitterionic form of amino acids (alanine, phenylalanine, and threonine) has been studied in aqueous solution. Measurements were performed at I = 0.1 M (NaCl/NaClO4), room temperature, and trace metal concentrations in the range of pH 2 to 8 using ultraviolet–visible (UV-Vis) and time-resolved laser-induced fluorescence spectroscopy (TRLFS). While complexation leads to a significant luminescence enhancement in the emission spectrum of the metal ion, absorption in the UV-Vis spectrum of the amino acid (AA) decreases. As zwitterionic species (AAH), all three ligands form weak complexes with 1:1 stoichiometry and a general formula of EuAAH3+ with the metal. The complex stability constants were determined to be log K ∼ 1 for all complexes, indicating the negligible contribution of the amino acid side chain to the complex formation reaction.

Virtual Issues
Vol. 5, Iss. 12 Virtual Journal for Biomedical Optics

Citation
Anne Heller, Olivia Rönitz, Astrid Barkleit, Gert Bernhard, and Jörg-Uwe Ackermann, "Complexation of Europium(III) with the Zwitterionic Form of Amino Acids Studied with Ultraviolet–Visible and Time-Resolved Laser-Induced Fluorescence Spectroscopy," Appl. Spectrosc. 64, 930-935 (2010)
http://www.opticsinfobase.org/vjbo/abstract.cfm?URI=as-64-8-930


Sort:  Journal  |  Reset

References

References are not available for this paper.

Cited By

OSA is able to provide readers links to articles that cite this paper by participating in CrossRef's Cited-By Linking service. CrossRef includes content from more than 3000 publishers and societies. In addition to listing OSA journal articles that cite this paper, citing articles from other participating publishers will also be listed.

« Previous Article  |  Next Article »

OSA is a member of CrossRef.

CrossCheck Deposited