Title: Adducts of Schiff bases with tris(beta-diketonato)lanthanide(III) complexes: Structure and liquid-crystalline behaviour
Authors: Binnemans, Koen ×
Lodewyckx, Katleen
Parac-Vogt, Tatjana
Van Deun, Rik
Goderis, Bart
Tinant, Bernard
Van Hecke, Kristof
Van Meervelt, Luc #
Issue Date: 2003
Publisher: Wiley-v c h verlag gmbh
Series Title: European journal of inorganic chemistry issue:16 pages:3028-3033
Abstract: Adducts of the Schiff base 2-hydroxy-N-octadecyloxy-4-tetradecyloxybenzaldimine with tris(beta-dibenzoylmethanato)lanthanide(III) complexes are described. The stoichiometry of the complexes is [Ln(dbm)(3)L-x], where Ln is a trivalent lanthanide ion (all lanthanides except Ce and Pm), Hdbm is dibenzoylmethane and L is the Schiff base; x = 2 for Ln = La-Er and x = 1 for Ln = Tm-Lu. The Schiff-base ligands are in a zwitterionic form and coordinate through the phenolic oxygen only. The X-ray single-crystal structure of [La(dbm)3L'2] with L' = N-butyl-2-hydroxy-4-methoxybenzaldimine is described. The solution structure of lanthanum(III) complexes has been investigated by 1D and 2D 1H NMR techniques. Although the long-chain Schiff-base ligand and the tris(beta-dibenzoylmethanato)lanthanide(III) complexes are non-mesomorphic, some of the adducts exhibit a monotropic smectic A phase. The mesomorphic behaviour depends on the lanthanide ion, in the sense that only a mesophase is observed for the series Ln = La-Eu, not for the heavier lanthanides.
ISSN: 1434-1948
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Molecular Design and Synthesis
Centre for Educational Development (-)
Molecular Imaging and Photonics
Biochemistry, Molecular and Structural Biology Section
Polymer Chemistry and Materials
× corresponding author
# (joint) last author

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