4.5 Article

Synthesis, characterization and emission properties of yttrium(III) and europium(III) complexes of a tripodal heptadentate Schiff-base ligand N[CH2CH2N=CH(2-OH-3-MeC6H3)]3

Journal

INORGANICA CHIMICA ACTA
Volume 367, Issue 1, Pages 225-229

Publisher

ELSEVIER SCIENCE SA
DOI: 10.1016/j.ica.2010.12.001

Keywords

Yttrium; Europium; Schiff-base; Tripodal ligand; Helical structure; Emission properties

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The preparation and characterization of yttrium(III) and europium(III) complexes of tripodal heptadentate Schiff-base ligand N[CH2CH2N=CH(2-OH-3-MeC6H3)](3) (H3L1) have been studied. These complexes were prepared by the reaction of tris(2-aminoethyl) amine with 3-methylsalicylaldehyde in presence of M(CF3SO3)(3) (M = Y, Eu) in methanol. The molecular structures of [YL1] (1) and [EuL1] (2) were determined by X-ray crystallography. The crystal structure analysis revealed that the Schiff-base behaves as a tri-deprotonated heptadentate ligand encapsulating the metal ion within the N4O3 cavity. Under the excitation of UV light, the solid state of these complexes exhibited blue and red emission, respectively. The optical properties of 1 and 2 in solution and in the solid state were examined. (C) 2010 Elsevier B.V. All rights reserved.

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