Title: Lanthanide(III) dodecanoates: Structure, thermal behaviour, and ion-size effects on the mesomorphism
Authors: Binnemans, Koen ×
Jongen, Liesbet
Görller-Walrand, Christiane
D'Olieslager, Willem
Hinz, Dirk
Meyer, Gerd #
Issue Date: 2000
Publisher: Wiley-v c h verlag gmbh
Series Title: European journal of inorganic chemistry issue:7 pages:1429-1436
Abstract: Rare-earth salts of dodecanoic acid (lauric acid) have been prepared and characterized. The compounds have the stoichiometry Ln(C11H23COO)3, where Ln = Y, La, Ce-Lu (except Pm). The thermal behaviour of these rare-earth dodecanoates has been investigated by hot-stage polarized optical microscopy, differential scanning calorimetry (DSC), thermogravimetry (TG), and high-temperature X-ray diffraction analysis. The compounds have a lamellar bilayer structure in the solid state, with the alkyl chains in an all-trans conformation normal to the ionic sublayer. The size of the trivalent lanthanide ion has proved to be a critical factor with regard to the existence of mesophases of this type of metallomesogens bearing carboxylate ligands. Thus, it was found that a mesophase can only be formed with the light lanthanide ions having large ionic radii. The mesophase stability range decreases rapidly on traversing the lanthanide series. Whereas a smectic A phase has been observed for the LaIII, CeIII, PrIII, and NdIII dodecanoates, no mesomorphism is apparent for the other lanthanide complexes.
ISSN: 1434-1948
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Molecular Design and Synthesis
× corresponding author
# (joint) last author

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