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Bioinorganic Chemistry and Applications
Volume 2010, Article ID 613140, 7 pages
Research Article

Interactions of Trivalent Lanthanide Cations with a New Hexadentate Di-Schiff Base: New Lanthanide(III) Complexes from (NE,N′E)-2,2′-(ethane-1,2-diylbis(oxy))bis(N-(pyridin-2-ylmethylene)ethanamine)

1Department of Chemistry, University of Ioannina, 451 10 Ioannina, Greece
2Faculty of Physics and Chemistry, Hellenic Army Academy, 166 73 Vari, Greece
3School of Chemistry, University of St. Andrews, North Haugh, St. Andrews, Fife, Scotland, KY16 9ST, UK

Received 22 April 2010; Accepted 2 May 2010

Academic Editor: Spyros Perlepes

Copyright © 2010 Mantha Tsiouri et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


The novel lanthanide(III) complexes 3MeOH (Ln = La 1, Pr 2) and 2MeOH (Ln = Gd 3, Yb 4), where L = (NE, E)-2, -(ethane-1,2-diylbis(oxy))bis(N-(pyridin-2-ylmethylene)ethanamine), have been obtained by direct reaction of the Schiff base ligand and the corresponding hydrated lanthanide(III) nitrates in methanol. All complexes were characterized spectroscopically and thermogravimetrically. Complex 4 was also characterized with crystallographic studies: orthorhombic P , (14), (15), (26) Å. In the molecular structure of 4, Yb(III) is surrounded by all donor atoms of the Schiff base (four nitrogen and two oxygen atoms) and four oxygen atoms belonging to two bidentate chelating nitrato ligands.