Title: Influence of the lanthanide contraction on the transition temperatures of rare-earth containing metallomesogens with Schiff base ligands
Authors: Binnemans, Koen ×
Van Deun, Rik
Bruce, Duncan W.
Galyametdinov, Yury G. #
Issue Date: 1999
Publisher: Elsevier science bv
Series Title: Chemical Physics Letters vol:300 issue:3-4 pages:509-514
Abstract: We have synthesised liquid-crystalline rare-earth complexes with Schiff base ligands. The stoichiometry of these complexes is Ln(LH)(3)(NO3)(3), where Ln is a trivalent rare-earth ion (Y3+, La3+-Lu3+, except Ce3+ and Pm3+), LH is the protonated form of the Schiff base 4-alkoxy-N-octadecyl-2-hydroxybenzaldimine. The mesophases were studied by optical microscopy and by differential scanning calorimetry (DSC). For the complexes with the 4-octyloxy-N-octadecyl-2-hydroxybenzaldimine ligand, a gradual increase in the melting point and a gradual decrease in the clearing point is found when going from La3+ to Lu3+. In this way, the mesophase range narrows over the lanthanide series. This is due to the lanthanide contraction. The textures observed by optical microscopy reveal the presence of a smectic A mesophase.
ISSN: 0009-2614
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Molecular Design and Synthesis
× corresponding author
# (joint) last author

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