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Title: Imidazolium Ionic Liquid Crystals with Pendant Mesogenic Groups
Authors: Goossens, Karel
Nockemann, Peter
Driesen, Kris
Goderis, Bart
Görller-Walrand, Christiane
Van Hecke, Kristof
Van Meervelt, Luc
Pouzet, Eric
Binnemans, Koen
Cardinaels, Thomas # ×
Issue Date: 2008
Publisher: American Chemical Society
Series Title: Chemistry of materials vol:20 issue:1 pages:157-168
Abstract: Ionic liquid crystals were obtained by coupling one or two mesogenic units (cholesterol or cyanobiphenyl) to an imidazolium cation. Anions are bromide, bis(trifluoromethylsulfonyl)imide, and tetrakis(2-thenoyltrifluoroacetonato)europate(III). The mesomorphism of the compounds depends on the type and number of mesogenic units and on the type of anion. In general, the most stable mesophases are observed for the bis(trifluoromethylsulfonyl)imide salts. Most of the compounds containing cholesterol moieties show enantiotropic SmA* phases over a broad temperature range, and some of them are room temperature liquid crystals. Modeling of the small-angle X-ray scattering patterns revealed the molecular arrangement in these mesophases. On the contrary, most of the compounds containing cyanobiphenyl groups exhibit monotropic lamellar or nematic mesophases, depending on the number of mesogenic units. The imidazolium salts containing the tetrakis(2-thenoyltrifluoroacetonato)europate(III) anion show an intense red photoluminescence.
ISSN: 0897-4756
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Molecular Design and Synthesis
Molecular Imaging and Photonics
Biochemistry, Molecular and Structural Biology Section
Polymer Chemistry and Materials
× corresponding author
# (joint) last author

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