, Volume 39, Issue 3, pp 261–262 | Cite as

Metal complex formation by nicotianamine, a possible phytosiderophore

  • I. Beneš
  • K. Schreiber
  • H. Ripperger
  • A. Kircheiss
Short Communications


The acid dissociation constants of nicotianamine (1) (pK1=6.97, pK2=9.13, pK3=9.75; 0.1 M KClO4, 25°C) and the stability constants for its 1∶1 complexes with bivalent metal ions (log KCu=18.6, log KNi=16.1, log KCo=14.8, log KZn=14.7, log KFe=12.1, log KMn=8.8, log KMg≈4.5; 0.1 M KClO4, 25°C) were determined using potentiometric titrations in aqueous solution. Fe(III)-nicotianamine complexes were not detected under the same experimental conditions.


Aqueous Solution Titration Complex Formation Metal Complex Stability Constant 
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Copyright information

© Birkhäuser Verlag 1983

Authors and Affiliations

  • I. Beneš
    • 1
    • 2
  • K. Schreiber
    • 1
    • 2
  • H. Ripperger
    • 1
    • 2
  • A. Kircheiss
    • 1
    • 2
  1. 1.Institute of Plant BiochemistryAcademy of Sciences of the GDRHalle/S.German Democratic Republic
  2. 2.Department of ChemistryMartin Luther UniversityHalle/S.German Democratic Republic

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