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A convenient method for preparing rigid-core ionic liquid crystals

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Author(s): Julien Fouchet | Laurent Douce | Benoît Heinrich | Richard Welter | Alain Louati

Journal: Beilstein Journal of Organic Chemistry
ISSN 1860-5397

Volume: 5;
Issue: 1;
Start page: 51;
Date: 2009;
Original page

Keywords: imidazolium | ionic liquid crystals | Ullman reaction

ABSTRACT
An efficient, solvent free method for the N-arylation of imidazole by 1-(dodecyloxy)-4-iodobenzene using Cu(II)-NaY as catalyst and K2CO3 as base is reported. By this synthetic approach, mesomorphic 3-[4-(dodecyloxy)phenyl]-1-methyl-1H-imidazol-3-ium iodide was synthesized in a two-step procedure, and its mesomorphism has been fully investigated by polarised optical microscopy, differential scanning calorimetry and X-ray diffraction. In addition its lamellar crystal structure, electrochemical behaviour and UV (absorption and emission) properties are reported.
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